{"title":"Collectors","description":null,"products":[{"product_id":"header-collectors-3in-to-2-5in-reducer","title":"Header Collectors 3in to 2.5in Reducer","description":"\u003ch2\u003eProduct Description\u003c\/h2\u003e\n\u003cp\u003eUpgrade your custom exhaust system with these high-quality 304 stainless steel Header Collectors, designed for performance builders, exhaust fabricators, and automotive enthusiasts. These header collector reducers provide a practical way to transition from a standard 3-inch 3-bolt header flange to a 2.5-inch exhaust system while maintaining a secure and reliable connection.\u003c\/p\u003e\n\u003cp\u003eBuilt from 18-gauge 304 stainless steel with an approximate 0.05-inch wall thickness, these Header Collectors are engineered to withstand the high temperatures and demanding conditions found in performance exhaust systems. The stainless steel construction provides excellent corrosion resistance and long-term durability, making these collectors suitable for street performance vehicles, race builds, hot rods, muscle cars, and custom exhaust projects.\u003c\/p\u003e\n\u003cp\u003eThe compact 3.5-inch overall length makes these header collector reducers particularly useful when exhaust routing space is limited. Their shorter design can help prevent interference with chassis components and provides greater flexibility when connecting headers to custom 2.5-inch exhaust piping.\u003c\/p\u003e\n\u003cp\u003eEach collector features a standard 3-inch 3-bolt header flange inlet and reduces to a 2.5-inch outlet. The outlet can be welded or clamped depending on the configuration of your custom exhaust system.\u003c\/p\u003e\n\u003cp\u003eSolid copper 3-bolt collector gaskets are included. Copper gaskets are well suited to high-temperature exhaust applications and can provide a durable sealing solution when properly installed.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e304 stainless steel Header Collectors\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eConverts 3-inch header outlet to 2.5-inch exhaust piping\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eStandard 3-inch 3-bolt header flange inlet\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e2.5-inch (2 1\/2-inch) exhaust outlet\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCompact approximately 3.5-inch overall length\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e18-gauge stainless steel construction\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eApproximately 0.05-inch wall thickness\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eExcellent heat and corrosion resistance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDesigned for custom exhaust fabrication\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIdeal for performance exhaust systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSuitable for tight exhaust routing applications\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIncludes solid copper 3-bolt collector gaskets\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMounting hardware included\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eHeader Collector Reducer Specifications\u003c\/h2\u003e\n\u003cp\u003eMaterial: 304 Stainless Steel\u003cbr\u003eMaterial Thickness: 18 Gauge\u003cbr\u003eApproximate Wall Thickness: 0.05 inch\u003cbr\u003eInlet: 3-inch 3-bolt header flange\u003cbr\u003eOutlet: 2.5-inch \/ 2 1\/2-inch exhaust\u003cbr\u003eOverall Length: Approximately 3.5 inches\u003cbr\u003eFlange Type: 3-bolt\u003cbr\u003eApplication: Universal custom exhaust systems\u003c\/p\u003e\n\u003ch2\u003eWhat's Included\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e2 × 304 stainless steel Header Collectors\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e2 × 3-inch 3-bolt flanges\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e2 × solid copper 3-bolt collector gaskets\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMounting hardware\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eHow These Header Collectors Work\u003c\/h2\u003e\n\u003cp\u003eThese Header Collectors are designed to connect performance headers with a 3-inch 3-bolt outlet to a smaller 2.5-inch exhaust system. The reducer design creates a convenient transition between the header collector and the exhaust piping, making it useful for custom exhaust systems where different pipe diameters need to be connected.\u003c\/p\u003e\n\u003cp\u003eThe compact design is especially beneficial for installations where space is limited. With an approximately 3.5-inch overall length, these collector reducers can provide more flexibility when routing exhaust around chassis components, suspension parts, or other underbody obstacles.\u003c\/p\u003e\n\u003cp\u003eThe 2.5-inch outlet can be welded directly to custom exhaust tubing or connected using an appropriate clamp, depending on the exhaust system design.\u003c\/p\u003e\n\u003ch2\u003eWhy Choose 304 Stainless Steel Header Collectors?\u003c\/h2\u003e\n\u003cp\u003e304 stainless steel is widely used in automotive exhaust systems because of its resistance to corrosion and ability to withstand high-temperature environments. These Header Collectors provide a durable solution for performance and custom exhaust applications where reliable materials and proper exhaust transitions are important.\u003c\/p\u003e\n\u003cp\u003eThe included solid copper collector gaskets are also designed for demanding exhaust environments. When correctly installed, the gaskets help create a reliable seal between the header flange and collector reducer.\u003c\/p\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cp\u003eThese Header Collectors are suitable for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eCustom exhaust systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePerformance exhaust builds\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMuscle cars\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eClassic cars\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHot rods\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eStreet performance vehicles\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRace and track builds\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCustom fabrication projects\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePerformance headers with 3-inch 3-bolt outlets\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eExhaust systems using 2.5-inch tubing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFitment Information\u003c\/h2\u003e\n\u003cp\u003eThese Header Collectors are designed for universal applications using standard 3-inch 3-bolt header collectors and 2.5-inch exhaust systems.\u003c\/p\u003e\n\u003cp\u003eBefore ordering, verify the header flange pattern, outlet diameter, available installation space, and exhaust routing on your vehicle. Because these are universal components, vehicle-specific fitment is not guaranteed.\u003c\/p\u003e\n\u003cp\u003eProfessional installation is recommended, particularly when welding the reducers to a custom exhaust system.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat are these Header Collectors used for?\u003c\/h3\u003e\n\u003cp\u003eThese Header Collectors are used to transition from a 3-inch 3-bolt header outlet to a 2.5-inch exhaust system. They are designed primarily for custom and performance exhaust fabrication.\u003c\/p\u003e\n\u003ch3\u003eWhat size header flange do these collectors fit?\u003c\/h3\u003e\n\u003cp\u003eThey are designed for standard 3-inch 3-bolt header collector outlets.\u003c\/p\u003e\n\u003ch3\u003eWhat size exhaust pipe do these Header Collectors connect to?\u003c\/h3\u003e\n\u003cp\u003eThe reducers have a 2.5-inch (2 1\/2-inch) outlet designed for compatible exhaust tubing.\u003c\/p\u003e\n\u003ch3\u003eWhat are these header collector reducers made from?\u003c\/h3\u003e\n\u003cp\u003eThey are constructed from 18-gauge 304 stainless steel with an approximate 0.05-inch wall thickness.\u003c\/p\u003e\n\u003ch3\u003eHow long are the collectors?\u003c\/h3\u003e\n\u003cp\u003eEach Header Collector measures approximately 3.5 inches in overall length.\u003c\/p\u003e\n\u003ch3\u003eAre gaskets included?\u003c\/h3\u003e\n\u003cp\u003eYes. The kit includes two solid copper 3-bolt collector gaskets.\u003c\/p\u003e\n\u003ch3\u003eAre mounting hardware and flanges included?\u003c\/h3\u003e\n\u003cp\u003eYes. The kit includes two 3-inch 3-bolt flanges and mounting hardware.\u003c\/p\u003e\n\u003ch3\u003eCan the 2.5-inch outlet be welded?\u003c\/h3\u003e\n\u003cp\u003eYes. The outlet can be welded to compatible exhaust tubing. It may also be connected using an appropriate exhaust clamp depending on the installation.\u003c\/p\u003e\n\u003ch3\u003eAre these Header Collectors universal?\u003c\/h3\u003e\n\u003cp\u003eThey are designed for universal applications using standard 3-inch 3-bolt header collectors and 2.5-inch exhaust systems. Always verify dimensions before purchasing.\u003c\/p\u003e\n\u003ch3\u003eAre these suitable for high-temperature exhaust applications?\u003c\/h3\u003e\n\u003cp\u003eYes. The 304 stainless steel construction is designed to withstand the heat and demanding conditions associated with automotive performance exhaust systems.\u003c\/p\u003e\n\u003ch3\u003eAre these suitable for tight exhaust spaces?\u003c\/h3\u003e\n\u003cp\u003eYes. The compact approximately 3.5-inch length is useful for custom exhaust installations where longer collector reducers may interfere with chassis components or exhaust routing.\u003c\/p\u003e\n\u003ch2\u003eFinal Fitment Summary\u003c\/h2\u003e\n\u003cp\u003eThese 304 stainless steel Header Collectors provide a compact and durable solution for adapting 3-inch 3-bolt performance headers to 2.5-inch exhaust systems. With 18-gauge 304 stainless steel construction, a compact 3.5-inch design, solid copper collector gaskets, 3-bolt flanges, and included mounting hardware, this kit is well suited for custom exhaust fabrication and performance applications.\u003c\/p\u003e\n\u003cp\u003eAlways confirm the header flange pattern, pipe diameter, dimensions, and available clearance before installation.\u003c\/p\u003e","brand":"Certified Automotive Experts","offers":[{"title":"Default Title","offer_id":51834163298626,"sku":"CAE-003-SS","price":79.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0716\/4664\/2498\/files\/Header_Collector.jpg?v=1786715885"},{"product_id":"2-5-3-bolt-header-collectors-stainless-steel-pair","title":"2.5\" 3-Bolt Header Collectors | Stainless Steel Pair","description":"\u003ch1\u003e2.5\" 3-Bolt Header Collectors – Stainless Steel Pair\u003c\/h1\u003e\n\u003cp\u003eCreate a clean connection between \u003cstrong\u003ecompatible 2.5-inch 3-bolt exhaust headers and a custom 2.5-inch exhaust system\u003c\/strong\u003e with these \u003cstrong\u003e2.5\" Header Collectors\u003c\/strong\u003e from Certified Automotive Experts. Designed for custom exhaust fabrication, these collectors feature a standard \u003cstrong\u003e2.5-inch 3-bolt flange and full 2.5-inch outlet\u003c\/strong\u003e, making the matched pair well suited for \u003cstrong\u003eLS swaps, hot rods, muscle cars, street rods, classic cars, and custom exhaust builds\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eUnlike the O2-bung version, these \u003cstrong\u003e2.5-inch exhaust collectors feature a clean, uninterrupted tube with no oxygen sensor bung\u003c\/strong\u003e. This makes them a practical choice when the O2 sensor will be installed farther downstream in the exhaust system or when an oxygen sensor provision at the header collector is not required.\u003c\/p\u003e\n\u003cp\u003eThe collectors are manufactured from \u003cstrong\u003ecorrosion-resistant stainless steel\u003c\/strong\u003e and supplied as a matched pair. Stainless steel construction provides durability for automotive exhaust applications where components are exposed to high temperatures, moisture, and repeated exhaust heat cycles.\u003c\/p\u003e\n\u003cp\u003eEach pair includes \u003cstrong\u003etwo solid copper 2.5-inch 3-bolt collector gaskets\u003c\/strong\u003e. Copper provides a durable sealing surface capable of handling repeated exhaust heat cycles while conforming under flange clamping pressure for a reliable header-to-collector connection.\u003c\/p\u003e\n\u003cp\u003eThe package includes \u003cstrong\u003etwo 2.5-inch stainless steel header collectors and two copper 3-bolt collector gaskets\u003c\/strong\u003e. \u003cstrong\u003eBolts and nuts are not included.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eDesigned for \u003cstrong\u003e2.5-inch 3-bolt exhaust headers\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFull \u003cstrong\u003e2.5-inch exhaust outlet\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eClean \u003cstrong\u003eno-O2-bung design\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCorrosion-resistant \u003cstrong\u003estainless steel construction\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDesigned for custom exhaust fabrication\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIncludes \u003cstrong\u003e2 copper 2.5-inch 3-bolt collector gaskets\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSupplied as a \u003cstrong\u003ematched pair\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSuitable for LS swaps, hot rods, muscle cars, street rods, and classic vehicles\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBolts and nuts \u003cstrong\u003enot included\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e2.5-Inch 3-Bolt Header Connection\u003c\/h2\u003e\n\u003cp\u003eEach collector features a \u003cstrong\u003estandard 2.5-inch 3-bolt flange\u003c\/strong\u003e, providing a straightforward connection to compatible exhaust headers. The full 2.5-inch outlet is designed to connect with compatible 2.5-inch exhaust tubing when building or modifying a custom exhaust system.\u003c\/p\u003e\n\u003cp\u003eThis makes these collectors a useful component for builders working on \u003cstrong\u003eLS engine swaps, performance exhaust systems, hot rods, muscle cars, street rods, and custom-built vehicles\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch2\u003eClean No-O2-Bung Design\u003c\/h2\u003e\n\u003cp\u003eThese collectors do not include an integrated oxygen sensor bung. The \u003cstrong\u003euninterrupted collector tube\u003c\/strong\u003e provides a simple exhaust path for applications where an O2 sensor is installed farther downstream.\u003c\/p\u003e\n\u003cp\u003eIf your exhaust system does not require an oxygen sensor provision at the collector, this no-bung design provides a clean and uncomplicated solution for custom exhaust fabrication.\u003c\/p\u003e\n\u003ch2\u003eStainless Steel Construction\u003c\/h2\u003e\n\u003cp\u003eThe collectors are made from \u003cstrong\u003ecorrosion-resistant stainless steel\u003c\/strong\u003e, providing durability for demanding automotive exhaust applications.\u003c\/p\u003e\n\u003cp\u003eStainless steel is well suited for exhaust components because of its resistance to corrosion and its ability to withstand the repeated temperature changes associated with engine and exhaust operation.\u003c\/p\u003e\n\u003ch2\u003eCopper Collector Gaskets Included\u003c\/h2\u003e\n\u003cp\u003eEach pair includes \u003cstrong\u003etwo solid copper 2.5-inch 3-bolt collector gaskets\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eCopper provides a durable sealing surface designed to withstand repeated exhaust heat cycles. Its ability to conform under flange clamping pressure makes it well suited for header collector applications.\u003c\/p\u003e\n\u003ch2\u003eIdeal Applications\u003c\/h2\u003e\n\u003cp\u003eThese 2.5-inch header collectors are suitable for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eLS engine swaps\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSmall Block Chevy applications\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eBig Block Chevy applications\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHot rods\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMuscle cars\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eStreet rods\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eClassic cars\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eClassic trucks\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEngine swaps\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCustom exhaust systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePerformance exhaust builds\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCustom exhaust fabrication\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhat's Included?\u003c\/h2\u003e\n\u003cp\u003eEach pair includes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e2 × 2.5\" stainless steel header collectors\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e2 × 2.5\" copper 3-bolt collector gaskets\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eBolts and nuts are not included.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eProduct Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eHeader Collector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInlet Size\u003c\/td\u003e\n\u003ctd\u003e2.5 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInlet Connection\u003c\/td\u003e\n\u003ctd\u003e3-Bolt Flange\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutlet Size\u003c\/td\u003e\n\u003ctd\u003e2.5 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eStainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eO2 Sensor Bung\u003c\/td\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGasket Material\u003c\/td\u003e\n\u003ctd\u003eCopper\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGaskets Included\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003ePair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eCustom Exhaust\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eHeader-to-Exhaust Connection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eFitment \u0026amp; Compatibility\u003c\/h2\u003e\n\u003cp\u003eThese collectors are designed for exhaust headers using a compatible \u003cstrong\u003e2.5-inch 3-bolt collector flange\u003c\/strong\u003e and exhaust systems requiring a \u003cstrong\u003e2.5-inch outlet\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eBefore ordering, verify:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eYour header collector diameter is \u003cstrong\u003e2.5 inches\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eYour headers use a compatible \u003cstrong\u003e3-bolt flange pattern\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eYour exhaust system requires a \u003cstrong\u003e2.5-inch outlet\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eThe collector dimensions provide sufficient clearance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eThe header flange matches the collector configuration\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eThis is a universal-style exhaust component and is not vehicle-specific.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat size headers do these collectors fit?\u003c\/h3\u003e\n\u003cp\u003eThey are designed for compatible headers using a \u003cstrong\u003e2.5-inch 3-bolt collector flange\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eWhat size is the outlet?\u003c\/h3\u003e\n\u003cp\u003eEach collector has a \u003cstrong\u003efull 2.5-inch outlet\u003c\/strong\u003e for connection to compatible exhaust tubing.\u003c\/p\u003e\n\u003ch3\u003eDo these collectors have O2 sensor bungs?\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eNo.\u003c\/strong\u003e These are the no-O2-bung collectors and feature a clean, uninterrupted tube.\u003c\/p\u003e\n\u003ch3\u003eAre these header collectors sold as a pair?\u003c\/h3\u003e\n\u003cp\u003eYes. The package includes \u003cstrong\u003etwo stainless steel 2.5-inch header collectors\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eAre copper collector gaskets included?\u003c\/h3\u003e\n\u003cp\u003eYes. \u003cstrong\u003eTwo 2.5-inch copper 3-bolt collector gaskets\u003c\/strong\u003e are included.\u003c\/p\u003e\n\u003ch3\u003eAre bolts and nuts included?\u003c\/h3\u003e\n\u003cp\u003eNo. \u003cstrong\u003eBolts and nuts are not included\u003c\/strong\u003e with this package.\u003c\/p\u003e\n\u003ch3\u003eAre these suitable for LS swaps?\u003c\/h3\u003e\n\u003cp\u003eYes. They are suitable for \u003cstrong\u003eLS swap applications\u003c\/strong\u003e when used with compatible headers featuring a 2.5-inch 3-bolt collector flange.\u003c\/p\u003e\n\u003ch3\u003eCan these be used for custom exhaust fabrication?\u003c\/h3\u003e\n\u003cp\u003eYes. These collectors are designed for \u003cstrong\u003ecustom exhaust systems and fabrication projects\u003c\/strong\u003e requiring a compatible 2.5-inch 3-bolt header connection and 2.5-inch outlet.\u003c\/p\u003e\n\u003ch2\u003eWhy Choose These 2.5\" Header Collectors?\u003c\/h2\u003e\n\u003cp\u003eThese \u003cstrong\u003e2.5-inch stainless steel header collectors\u003c\/strong\u003e provide a straightforward solution for connecting compatible 3-bolt headers to a custom exhaust system. Their \u003cstrong\u003estandard 3-bolt flange, full 2.5-inch outlet, no-O2-bung design, stainless steel construction, and included copper collector gaskets\u003c\/strong\u003e make them a practical choice for a wide range of automotive exhaust projects.\u003c\/p\u003e\n\u003cp\u003eFrom \u003cstrong\u003eLS swaps and muscle cars to hot rods, street rods, classic cars, and custom exhaust builds\u003c\/strong\u003e, these collectors provide the connection needed to continue a compatible 2.5-inch exhaust system.\u003c\/p\u003e","brand":"Certified Automotive Experts","offers":[{"title":"Default Title","offer_id":55936763658562,"sku":"CAE-2.5x2.5-COLLECTOR-NB","price":64.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0716\/4664\/2498\/files\/2.5_3-Bolt_Header_Collectors_Stainless_Steel_Pair.jpg?v=1787571956"},{"product_id":"2-5-to-2-header-collector-reducers-3-bolt-stainless-steel","title":"2.5\" to 2\" Header Collector Reducers – 3-Bolt Stainless Steel","description":"\u003ch1\u003e2.5\" to 2\" Header Collector Reducers – 3-Bolt Stainless Steel Pair\u003c\/h1\u003e\n\u003cp\u003eCreate a compact transition from \u003cstrong\u003e2.5-inch 3-bolt header collectors to 2-inch exhaust tubing\u003c\/strong\u003e with these \u003cstrong\u003e2.5\" to 2\" Header Collector Reducers\u003c\/strong\u003e from Certified Automotive Experts. Designed for custom exhaust systems where space is limited, these short collector reducers help simplify exhaust routing around transmissions, crossmembers, frame rails, and other chassis components.\u003c\/p\u003e\n\u003cp\u003eWith an overall length of approximately \u003cstrong\u003e2 inches from the flange face to the outlet\u003c\/strong\u003e, the compact design minimizes the amount of space used between the header and exhaust system. This makes them especially useful for \u003cstrong\u003eSmall Block Chevy headers, hot rods, classic cars, engine swaps, street machines, and custom exhaust builds\u003c\/strong\u003e using a compatible 2.5-inch 3-bolt collector flange.\u003c\/p\u003e\n\u003cp\u003eEach reducer features a \u003cstrong\u003eone-piece welded 3-bolt flange\u003c\/strong\u003e approximately 0.30 inch thick. Unlike loose collector flanges that must be positioned separately during fabrication, the integrated flange and reducer assembly provides a straightforward component for fitting and welding your exhaust system.\u003c\/p\u003e\n\u003cp\u003eThe reducers are constructed from \u003cstrong\u003epolished stainless steel\u003c\/strong\u003e, providing corrosion resistance and a clean appearance that complements custom exhaust installations. Each pair also includes \u003cstrong\u003e2.5-inch copper 3-bolt collector gaskets\u003c\/strong\u003e and a \u003cstrong\u003e3\/8\"-16 collector hardware kit\u003c\/strong\u003e, so you have the essential mounting components needed for the header-to-reducer connection.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eConverts \u003cstrong\u003e2.5-inch header collectors to 2-inch exhaust tubing\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDesigned for compatible \u003cstrong\u003e2.5-inch 3-bolt header collectors\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCompact approximately \u003cstrong\u003e2-inch overall length\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIdeal for tight exhaust-routing applications\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOne-piece welded collector flange and reducer construction\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eApproximately \u003cstrong\u003e0.30-inch thick 3-bolt flange\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePolished stainless steel construction\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIncludes \u003cstrong\u003e2.5-inch copper collector gaskets\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIncludes \u003cstrong\u003e3\/8\"-16 collector mounting hardware\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHardware uses \u003cstrong\u003e9\/16-inch hex\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDesigned for welding into custom exhaust systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSuitable for Small Block Chevy headers and other compatible applications\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSold as a pair\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eCompact Design for Tight Exhaust Clearance\u003c\/h2\u003e\n\u003cp\u003eExhaust routing can become difficult when there is limited space between the headers and the rest of the exhaust system. A long reducer can consume valuable room around the transmission, crossmember, frame, floor, and other chassis components.\u003c\/p\u003e\n\u003cp\u003eThese \u003cstrong\u003e2.5-inch to 2-inch header collector reducers\u003c\/strong\u003e keep the transition short, with approximately \u003cstrong\u003e2 inches of length from the flange face to the outlet\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThe compact design gives exhaust builders more flexibility when routing 2-inch tubing through tight areas, making these reducers particularly useful for custom-built vehicles and project cars where every inch of clearance matters.\u003c\/p\u003e\n\u003ch2\u003eOne-Piece 3-Bolt Collector Design\u003c\/h2\u003e\n\u003cp\u003eThe approximately \u003cstrong\u003e0.30-inch-thick 3-bolt flange is welded directly to the reducer\u003c\/strong\u003e, creating a one-piece assembly.\u003c\/p\u003e\n\u003cp\u003eThis design eliminates the need to position a separate loose flange while fabricating the exhaust. The integrated construction makes the reducer easier to position during installation and provides a clean starting point for connecting your 2-inch exhaust tubing.\u003c\/p\u003e\n\u003ch2\u003ePolished Stainless Steel Construction\u003c\/h2\u003e\n\u003cp\u003eThe reducers feature a \u003cstrong\u003epolished stainless steel construction\u003c\/strong\u003e designed to provide corrosion resistance and a clean appearance for custom exhaust systems.\u003c\/p\u003e\n\u003cp\u003eStainless steel is well suited to automotive exhaust applications where components are exposed to high temperatures, moisture, road conditions, and repeated heat cycles.\u003c\/p\u003e\n\u003ch2\u003eCopper Collector Gaskets Included\u003c\/h2\u003e\n\u003cp\u003eEach pair includes \u003cstrong\u003e2.5-inch copper 3-bolt collector gaskets\u003c\/strong\u003e for the connection between the header and reducer.\u003c\/p\u003e\n\u003cp\u003eCopper is well suited for exhaust collector applications because it can handle repeated temperature changes when properly installed. The supplied gaskets provide a dedicated sealing surface between the header collector and reducer flange.\u003c\/p\u003e\n\u003ch2\u003eCollector Hardware Included\u003c\/h2\u003e\n\u003cp\u003eYou don't need to purchase the collector mounting hardware separately.\u003c\/p\u003e\n\u003cp\u003eThe kit includes a \u003cstrong\u003e3\/8\"-16 collector hardware set\u003c\/strong\u003e with flange bolts and matching flange nuts featuring a \u003cstrong\u003e9\/16-inch hex\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThis gives you the essential hardware for securing the reducer to compatible 2.5-inch 3-bolt headers.\u003c\/p\u003e\n\u003ch2\u003eIdeal Applications\u003c\/h2\u003e\n\u003cp\u003eThese header collector reducers are suitable for a wide range of custom automotive applications, including:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eSmall Block Chevy headers\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHot rods\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eClassic cars\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMuscle cars\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eClassic trucks\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEngine swaps\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eStreet machines\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCustom-built vehicles\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eProject cars\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCustom exhaust fabrication\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePerformance exhaust systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTight-clearance exhaust installations\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhat's Included?\u003c\/h2\u003e\n\u003cp\u003eEach pair includes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e2 × 2.5\" to 2\" header collector reducers\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e2 × 2.5\" copper 3-bolt collector gaskets\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e3\/8\"-16 collector hardware kit\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFlange bolts\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFlange nuts\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eProduct Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eHeader Collector Reducer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInlet Size\u003c\/td\u003e\n\u003ctd\u003e2.5 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutlet Size\u003c\/td\u003e\n\u003ctd\u003e2 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCollector Connection\u003c\/td\u003e\n\u003ctd\u003e3-Bolt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApprox. Length\u003c\/td\u003e\n\u003ctd\u003e2 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlange Thickness\u003c\/td\u003e\n\u003ctd\u003eApprox. 0.30 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eStainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003ePolished\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGasket Material\u003c\/td\u003e\n\u003ctd\u003eCopper\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHardware Thread\u003c\/td\u003e\n\u003ctd\u003e3\/8\"-16\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHardware Hex Size\u003c\/td\u003e\n\u003ctd\u003e9\/16 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003ePair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eWeld-In \/ Custom Exhaust\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eUniversal, compatible 2.5\" 3-bolt headers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eFitment \u0026amp; Compatibility\u003c\/h2\u003e\n\u003cp\u003eThese reducers are designed for headers using a compatible \u003cstrong\u003e2.5-inch 3-bolt collector flange\u003c\/strong\u003e and exhaust systems using \u003cstrong\u003e2-inch tubing\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThey are commonly suited to \u003cstrong\u003eSmall Block Chevy header applications\u003c\/strong\u003e, but they are not limited to one specific vehicle or engine.\u003c\/p\u003e\n\u003cp\u003eBefore ordering, verify:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eYour header collector diameter is 2.5 inches\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eYour header uses a compatible 3-bolt collector pattern\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eYour exhaust tubing is 2 inches\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eYou have sufficient clearance for the approximately 2-inch reducer length\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eThe collector flange and bolt pattern match your application\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eThis is a universal-style exhaust component and is not vehicle-specific.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat size exhaust does this reducer fit?\u003c\/h3\u003e\n\u003cp\u003eIt transitions from a \u003cstrong\u003e2.5-inch header collector to 2-inch exhaust tubing\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eHow long are these collector reducers?\u003c\/h3\u003e\n\u003cp\u003eThe reducers are approximately \u003cstrong\u003e2 inches long from the flange face to the outlet\u003c\/strong\u003e, making them useful for tight exhaust installations.\u003c\/p\u003e\n\u003ch3\u003eAre these reducers compatible with Small Block Chevy headers?\u003c\/h3\u003e\n\u003cp\u003eYes. They are designed for use with \u003cstrong\u003eSmall Block Chevy headers using a compatible 2.5-inch 3-bolt collector flange\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eIs the 3-bolt flange included?\u003c\/h3\u003e\n\u003cp\u003eYes. The approximately 0.30-inch-thick 3-bolt flange is \u003cstrong\u003ewelded directly to the reducer\u003c\/strong\u003e as a one-piece assembly.\u003c\/p\u003e\n\u003ch3\u003eAre collector gaskets included?\u003c\/h3\u003e\n\u003cp\u003eYes. The pair includes \u003cstrong\u003e2.5-inch copper 3-bolt collector gaskets\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eIs mounting hardware included?\u003c\/h3\u003e\n\u003cp\u003eYes. A \u003cstrong\u003e3\/8\"-16 collector hardware kit\u003c\/strong\u003e with flange bolts and nuts is included.\u003c\/p\u003e\n\u003ch3\u003eWhat size hex do the included hardware pieces use?\u003c\/h3\u003e\n\u003cp\u003eThe included collector hardware uses a \u003cstrong\u003e9\/16-inch hex\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eCan these reducers be welded to an exhaust system?\u003c\/h3\u003e\n\u003cp\u003eYes. The 2-inch outlet is intended to be incorporated into a compatible custom exhaust system.\u003c\/p\u003e\n\u003ch2\u003eWhy Choose These 2.5\" to 2\" Reducers?\u003c\/h2\u003e\n\u003cp\u003eWhen a vehicle has \u003cstrong\u003e2.5-inch headers but requires a 2-inch exhaust system\u003c\/strong\u003e, a compact collector reducer provides a simple way to make the transition without taking up unnecessary space.\u003c\/p\u003e\n\u003cp\u003eThe short approximately 2-inch design, integrated 3-bolt flange, polished stainless steel construction, copper gaskets, and included mounting hardware make this pair a practical solution for builders working on \u003cstrong\u003etight-clearance exhaust systems, Small Block Chevy projects, hot rods, classic cars, and custom engine swaps\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch2\u003eAnswer-First Product Summary\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are these reducers?\u003c\/strong\u003e\u003cbr\u003eThese are a pair of \u003cstrong\u003e2.5-inch to 2-inch header collector reducers\u003c\/strong\u003e designed to connect compatible 2.5-inch 3-bolt header collectors to 2-inch exhaust tubing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow long are they?\u003c\/strong\u003e\u003cbr\u003eEach reducer is approximately \u003cstrong\u003e2 inches long\u003c\/strong\u003e, providing a compact transition for tight exhaust-routing applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre they suitable for Small Block Chevy headers?\u003c\/strong\u003e\u003cbr\u003eYes. They are designed to work with \u003cstrong\u003eSmall Block Chevy headers that use a compatible 2.5-inch 3-bolt collector flange\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is included?\u003c\/strong\u003e\u003cbr\u003eThe pair includes \u003cstrong\u003etwo stainless steel reducers, two copper 3-bolt collector gaskets, and 3\/8\"-16 collector mounting hardware\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre they vehicle-specific?\u003c\/strong\u003e\u003cbr\u003eNo. They are universal-style components. Always verify your header collector size, 3-bolt pattern, exhaust tubing size, and available clearance before installation.\u003c\/p\u003e","brand":"Certified Automotive Experts","offers":[{"title":"Default Title","offer_id":55942514180418,"sku":"CAE-2.5x2-COLL","price":299.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0716\/4664\/2498\/files\/2.5_to_2_Header_Collector_Reducers_3-Bolt_Stainless_Steel.jpg?v=1787570248"},{"product_id":"2-5-v-band-header-collectors-with-clamps-set-of-2","title":"2.5\" V-Band Header Collectors with Clamps | Set of 2","description":"\u003ch1\u003e2.5\" V-Band Header Collectors with Clamps – Set of 2\u003c\/h1\u003e\n\u003cp\u003eBuild a cleaner, stronger, and more serviceable exhaust connection with these \u003cstrong\u003e2.5-inch V-Band Header Collectors\u003c\/strong\u003e from Certified Automotive Experts. Designed with a \u003cstrong\u003e2.5-inch inlet and 2.5-inch outlet\u003c\/strong\u003e, these universal V-band collectors provide a reliable connection between custom headers and exhaust tubing while eliminating the hassle of traditional 3-bolt collector flanges.\u003c\/p\u003e\n\u003cp\u003eThis complete kit includes \u003cstrong\u003etwo polished 304 stainless steel V-band header collectors and matching V-band clamps\u003c\/strong\u003e, giving you the essential components needed to integrate V-band connections into a custom exhaust system. The V-band design uses a precision metal-to-metal connection rather than relying on a conventional collector gasket, helping reduce potential leak points while making the exhaust easier to remove and service.\u003c\/p\u003e\n\u003cp\u003eWhether you're building an \u003cstrong\u003eLS engine swap, hot rod, muscle car, classic truck, race car, off-road vehicle, or custom performance exhaust system\u003c\/strong\u003e, these 2.5-inch V-band collectors provide the flexibility and serviceability needed for demanding builds.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e2.5-inch inlet and 2.5-inch outlet\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eComplete \u003cstrong\u003eset of 2 V-band header collectors\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIncludes \u003cstrong\u003ematching V-band clamps\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eConstructed from durable \u003cstrong\u003e304 stainless steel\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePolished stainless steel finish\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFully welded seams for durable construction\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePrecision \u003cstrong\u003eV-band connection\u003c\/strong\u003e for easy installation and removal\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMetal-to-metal sealing design helps reduce potential gasket-related leaks\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIncludes welded \u003cstrong\u003eM18 x 1.5 oxygen sensor bungs\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eThreaded O2 sensor plugs included\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRotatable collector design allows flexible O2 sensor positioning\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIdeal for custom and performance exhaust fabrication\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSuitable for welding into new or modified exhaust systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eV-Band Design for Easier Exhaust Service\u003c\/h2\u003e\n\u003cp\u003eTraditional exhaust collector connections often use 3-bolt flanges, bolts, and gaskets that can become difficult to remove after repeated exposure to heat and corrosion.\u003c\/p\u003e\n\u003cp\u003eThese \u003cstrong\u003e2.5-inch V-band collectors\u003c\/strong\u003e provide a simpler alternative. The supplied V-band clamp draws the matching flanges together to create a secure metal-to-metal connection.\u003c\/p\u003e\n\u003cp\u003eThe result is a connection that's easier to access when you need to remove the exhaust for:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eTransmission service\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eClutch replacement\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEngine removal\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHeader replacement\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eExhaust modifications\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePerformance upgrades\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eGeneral maintenance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eInstead of fighting rusted collector bolts and worn gaskets, simply release the V-band clamp to separate the exhaust components.\u003c\/p\u003e\n\u003ch2\u003eIntegrated M18 x 1.5 O2 Sensor Bung\u003c\/h2\u003e\n\u003cp\u003eEach collector includes a \u003cstrong\u003ewelded M18 x 1.5 oxygen sensor bung\u003c\/strong\u003e with a threaded plug already installed.\u003c\/p\u003e\n\u003cp\u003eBecause the O2 bung is integrated into the collector, you can rotate the assembly before tightening the V-band clamp. This gives you greater flexibility when positioning an oxygen sensor around:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eFrame rails\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eTransmission cases\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSteering components\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCrossmembers\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFloor pans\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eChassis components\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOther underbody obstacles\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe included threaded plug allows the collector to be installed immediately. The plug can later be replaced with a compatible \u003cstrong\u003efactory-style or wideband oxygen sensor\u003c\/strong\u003e for EFI systems, tuning, and engine management applications.\u003c\/p\u003e\n\u003ch2\u003e304 Stainless Steel Construction\u003c\/h2\u003e\n\u003cp\u003eThese V-band header collectors are manufactured from \u003cstrong\u003e304 stainless steel\u003c\/strong\u003e with fully welded seams. The stainless construction provides excellent durability in the high-temperature environment of a performance exhaust system while offering greater resistance to corrosion than typical mild-steel components.\u003c\/p\u003e\n\u003cp\u003eThe polished finish also provides a clean appearance for custom engine bays and exhaust installations.\u003c\/p\u003e\n\u003ch2\u003eUniversal Custom Exhaust Application\u003c\/h2\u003e\n\u003cp\u003eThese collectors are designed as \u003cstrong\u003euniversal exhaust components rather than vehicle-specific parts\u003c\/strong\u003e. They are ready to weld into a custom exhaust system where a 2.5-inch V-band connection is required.\u003c\/p\u003e\n\u003cp\u003eCommon applications include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eLS engine swaps\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHot rods\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMuscle cars\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eClassic cars\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eClassic trucks\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eRace cars\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eOff-road vehicles\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eStreet performance builds\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCustom exhaust systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEngine swap projects\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCompetition and track builds\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhat's Included?\u003c\/h2\u003e\n\u003cp\u003eEach kit includes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e2 × 2.5-inch V-band header collectors\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e2 × matching V-band clamps\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e2 × M18 x 1.5 O2 sensor plugs\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eProduct Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eV-Band Header Collector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInlet Diameter\u003c\/td\u003e\n\u003ctd\u003e2.5 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutlet Diameter\u003c\/td\u003e\n\u003ctd\u003e2.5 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003eSet of 2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnection Type\u003c\/td\u003e\n\u003ctd\u003eV-Band\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e304 Stainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003ePolished\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eFully Welded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eO2 Sensor Bung\u003c\/td\u003e\n\u003ctd\u003eM18 x 1.5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eO2 Plugs\u003c\/td\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eV-Band Clamps\u003c\/td\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eWeld-In\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eUniversal \/ Custom Exhaust\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat size exhaust are these V-band collectors for?\u003c\/h3\u003e\n\u003cp\u003eThese collectors feature a \u003cstrong\u003e2.5-inch inlet and 2.5-inch outlet\u003c\/strong\u003e, making them suitable for compatible 2.5-inch custom exhaust applications.\u003c\/p\u003e\n\u003ch3\u003eAre V-band clamps included?\u003c\/h3\u003e\n\u003cp\u003eYes. The kit includes \u003cstrong\u003ematching V-band clamps\u003c\/strong\u003e for both collectors.\u003c\/p\u003e\n\u003ch3\u003eAre these collectors made from stainless steel?\u003c\/h3\u003e\n\u003cp\u003eYes. They are constructed from \u003cstrong\u003epolished 304 stainless steel\u003c\/strong\u003e with fully welded seams.\u003c\/p\u003e\n\u003ch3\u003eDo they require a collector gasket?\u003c\/h3\u003e\n\u003cp\u003eThe V-band connection is designed to create a \u003cstrong\u003emetal-to-metal seal using the matching flanges and supplied clamp\u003c\/strong\u003e, eliminating the need for a traditional collector gasket.\u003c\/p\u003e\n\u003ch3\u003eDo the collectors have O2 sensor bungs?\u003c\/h3\u003e\n\u003cp\u003eYes. Each collector features a welded \u003cstrong\u003eM18 x 1.5 O2 sensor bung\u003c\/strong\u003e and includes a threaded plug.\u003c\/p\u003e\n\u003ch3\u003eCan I adjust the O2 sensor position?\u003c\/h3\u003e\n\u003cp\u003eYes. The collector can be rotated before tightening the V-band clamp, allowing you to position the oxygen sensor for better clearance and accessibility.\u003c\/p\u003e\n\u003ch3\u003eAre these vehicle-specific?\u003c\/h3\u003e\n\u003cp\u003eNo. These are \u003cstrong\u003euniversal weld-in exhaust components\u003c\/strong\u003e. Always verify your required dimensions and available clearance before installation.\u003c\/p\u003e\n\u003ch3\u003eWhat vehicles can use these collectors?\u003c\/h3\u003e\n\u003cp\u003eThey can be used for a wide variety of custom projects, including \u003cstrong\u003eLS swaps, hot rods, muscle cars, classic trucks, race cars, off-road vehicles, and custom performance vehicles\u003c\/strong\u003e, provided the dimensions and application requirements are compatible.\u003c\/p\u003e\n\u003ch2\u003eInstallation \u0026amp; Fitment\u003c\/h2\u003e\n\u003cp\u003eThese collectors are designed to be \u003cstrong\u003ewelded into a custom exhaust system\u003c\/strong\u003e. Professional exhaust fabrication or welding is recommended for installation.\u003c\/p\u003e\n\u003cp\u003eBefore purchasing, verify:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e2.5-inch header\/exhaust tubing compatibility\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eAvailable underbody clearance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eV-band flange dimensions\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eO2 sensor clearance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCollector orientation\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eExhaust routing requirements\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBecause this is a universal component, \u003cstrong\u003evehicle-specific fitment is not guaranteed\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch2\u003eWhy Choose 2.5-Inch V-Band Header Collectors?\u003c\/h2\u003e\n\u003cp\u003eIf you're building a custom exhaust system and want a connection that's easier to service than a conventional 3-bolt flange, these V-band header collectors offer a practical solution. The \u003cstrong\u003e304 stainless steel construction, integrated O2 sensor bung, compact V-band connection, and included clamps\u003c\/strong\u003e make them well suited for performance-oriented custom builds.\u003c\/p\u003e\n\u003cp\u003eThe ability to quickly disconnect the exhaust can save significant time during future engine, transmission, clutch, or exhaust work.\u003c\/p\u003e\n\u003ch2\u003eAnswer-First Summary\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are these?\u003c\/strong\u003e\u003cbr\u003eThese are a \u003cstrong\u003eset of two 2.5-inch V-band header collectors\u003c\/strong\u003e made from polished 304 stainless steel. Each collector has a 2.5-inch inlet and outlet, an M18 x 1.5 O2 sensor bung, and comes with a matching V-band clamp.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are they used for?\u003c\/strong\u003e\u003cbr\u003eThey are designed for \u003cstrong\u003ecustom exhaust fabrication\u003c\/strong\u003e, providing a serviceable V-band connection between headers and exhaust tubing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre they suitable for LS swaps?\u003c\/strong\u003e\u003cbr\u003eYes. They are suitable for LS swaps and other custom builds when the \u003cstrong\u003e2.5-inch dimensions and V-band connection requirements\u003c\/strong\u003e match the application.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat makes V-band collectors useful?\u003c\/strong\u003e\u003cbr\u003eV-band connections allow the exhaust to be disconnected quickly without dealing with traditional multi-bolt collector flanges and separate collector gaskets, making future maintenance and modifications easier.\u003c\/p\u003e","brand":"Certified Automotive Experts","offers":[{"title":"Default Title","offer_id":55942592102722,"sku":"CAE-2.5x2.5-VBAND","price":240.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0716\/4664\/2498\/files\/2.5_V-Band_Header_Collectors_with_Clamps_Set_of_2.jpg?v=1787569883"},{"product_id":"3-to-2-5-stainless-header-collector-reducers","title":"3\" to 2.5\" Stainless Header Collector Reducers","description":"\u003ch1\u003e3\" to 2.5\" Stainless Steel Header Collector Reducers – 3-Bolt\u003c\/h1\u003e\n\u003cp\u003eBuild a clean transition from \u003cstrong\u003e3-inch header collectors to a 2.5-inch exhaust system\u003c\/strong\u003e with this pair of \u003cstrong\u003e3\" to 2.5\" stainless steel header collector reducers\u003c\/strong\u003e from Certified Automotive Experts. Designed for headers with a standard \u003cstrong\u003e3-bolt 3-inch collector flange\u003c\/strong\u003e, these compact reducers provide a practical solution when your exhaust system uses smaller 2.5-inch tubing.\u003c\/p\u003e\n\u003cp\u003eMade from \u003cstrong\u003e18-gauge 304 stainless steel tubing\u003c\/strong\u003e with approximately \u003cstrong\u003e0.05-inch wall thickness\u003c\/strong\u003e, these exhaust collector reducers are designed for durability, heat resistance, and reliable performance in demanding automotive exhaust applications. At approximately \u003cstrong\u003e3.5 inches long\u003c\/strong\u003e, their compact design helps save valuable space when routing exhaust around crossmembers, transmissions, floor pans, driveshafts, and other underbody components.\u003c\/p\u003e\n\u003cp\u003eEach reducer features a \u003cstrong\u003e3-inch inlet and 2.5-inch outlet\u003c\/strong\u003e, making it suitable for connecting compatible 3-inch, 3-bolt header collectors to 2.5-inch exhaust tubing. The 2.5-inch outlet can be incorporated into a \u003cstrong\u003ewelded or clamped exhaust system\u003c\/strong\u003e, depending on your installation requirements.\u003c\/p\u003e\n\u003cp\u003eThe kit includes \u003cstrong\u003etwo solid copper collector gaskets\u003c\/strong\u003e designed to provide a dependable sealing surface at the hot header collector connection. Mounting hardware is also included, giving you the essential components needed to install the reducers without having to source additional collector bolts separately.\u003c\/p\u003e\n\u003cp\u003eThese reducers are not limited to a specific vehicle or engine. They are an excellent choice for \u003cstrong\u003ehot rods, muscle cars, classic trucks, street machines, engine swaps, custom builds, and other project vehicles\u003c\/strong\u003e using compatible 3-inch 3-bolt headers and 2.5-inch exhaust tubing.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e3-inch to 2.5-inch exhaust transition\u003c\/strong\u003e for compatible header systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDesigned for \u003cstrong\u003e3-inch, 3-bolt header collectors\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMade from \u003cstrong\u003e18-gauge 304 stainless steel\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eApproximately \u003cstrong\u003e0.05-inch wall thickness\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCompact \u003cstrong\u003eapproximately 3.5-inch overall length\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHelps simplify exhaust routing in tight underbody spaces\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCompatible with welded or clamped \u003cstrong\u003e2.5-inch exhaust systems\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIncludes \u003cstrong\u003esolid copper collector gaskets\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMounting hardware included\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSuitable for custom exhaust systems, engine swaps, hot rods, muscle cars, and classic trucks\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSold as a \u003cstrong\u003epair of two stainless steel collector reducers\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhy Choose These 3\" to 2.5\" Header Reducers?\u003c\/h2\u003e\n\u003cp\u003eA 3-inch header collector does not require a complete 3-inch exhaust system. If your headers have \u003cstrong\u003e3-inch 3-bolt collectors\u003c\/strong\u003e but your planned exhaust system uses \u003cstrong\u003e2.5-inch tubing\u003c\/strong\u003e, these reducers provide a compact and straightforward way to make the transition.\u003c\/p\u003e\n\u003cp\u003eTheir short design is particularly useful when exhaust space is limited. Instead of using a longer transition that can complicate exhaust routing, these approximately 3.5-inch reducers give you additional room to position your exhaust around the vehicle's chassis and underbody components.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003e304 stainless steel construction\u003c\/strong\u003e provides a durable material for an exhaust environment where heat, vibration, and road conditions can be demanding.\u003c\/p\u003e\n\u003ch2\u003eWhat's Included?\u003c\/h2\u003e\n\u003cp\u003eEach kit includes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e2 × 3\" to 2.5\" stainless steel collector reducers\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e2 × solid copper collector gaskets\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eMounting hardware\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eHeader Collector Reducer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInlet Diameter\u003c\/td\u003e\n\u003ctd\u003e3 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutlet Diameter\u003c\/td\u003e\n\u003ctd\u003e2.5 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCollector Connection\u003c\/td\u003e\n\u003ctd\u003e3-Bolt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e304 Stainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial Gauge\u003c\/td\u003e\n\u003ctd\u003e18 Gauge\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApprox. Wall Thickness\u003c\/td\u003e\n\u003ctd\u003e0.05 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApprox. Length\u003c\/td\u003e\n\u003ctd\u003e3.5 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003e2 Reducers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGaskets\u003c\/td\u003e\n\u003ctd\u003e2 Solid Copper Collector Gaskets\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eWelded or Clamped Exhaust System\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eCustom Automotive Exhaust Systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cp\u003eThese 3-inch to 2.5-inch header collector reducers can be used for a variety of custom automotive applications, including:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eHot rods\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMuscle cars\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eClassic cars\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eClassic trucks\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eStreet machines\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eEngine swaps\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCustom-built vehicles\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003ePerformance exhaust systems\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eProject cars\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCustom exhaust fabrication\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eThese reducers are designed for applications using a \u003cstrong\u003ecompatible 3-inch, 3-bolt header collector\u003c\/strong\u003e and a \u003cstrong\u003e2.5-inch exhaust system\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e Please verify your header collector flange pattern, collector diameter, outlet size, and available installation space before ordering. This is a universal-style exhaust component and is \u003cstrong\u003enot vehicle-specific\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat size headers do these reducers fit?\u003c\/h3\u003e\n\u003cp\u003eThey are designed to connect headers with a \u003cstrong\u003e3-inch, 3-bolt collector\u003c\/strong\u003e to a \u003cstrong\u003e2.5-inch exhaust system\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eWhat is the outlet size?\u003c\/h3\u003e\n\u003cp\u003eThe outlet is designed for \u003cstrong\u003e2.5-inch exhaust tubing\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eWhat material are the reducers made from?\u003c\/h3\u003e\n\u003cp\u003eThe reducers are constructed from \u003cstrong\u003e18-gauge 304 stainless steel tubing\u003c\/strong\u003e with approximately \u003cstrong\u003e0.05-inch wall thickness\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eHow long are the reducers?\u003c\/h3\u003e\n\u003cp\u003eEach reducer is approximately \u003cstrong\u003e3.5 inches long\u003c\/strong\u003e, making them useful where exhaust installation space is limited.\u003c\/p\u003e\n\u003ch3\u003eCan these reducers be welded?\u003c\/h3\u003e\n\u003cp\u003eYes. The 2.5-inch outlets can be incorporated into a \u003cstrong\u003ewelded exhaust system\u003c\/strong\u003e. They can also be used with a suitable clamped exhaust setup.\u003c\/p\u003e\n\u003ch3\u003eAre gaskets included?\u003c\/h3\u003e\n\u003cp\u003eYes. The kit includes \u003cstrong\u003etwo solid copper collector gaskets\u003c\/strong\u003e, one for each reducer.\u003c\/p\u003e\n\u003ch3\u003eIs mounting hardware included?\u003c\/h3\u003e\n\u003cp\u003eYes. Mounting hardware is included with the kit.\u003c\/p\u003e\n\u003ch3\u003eAre these reducers vehicle-specific?\u003c\/h3\u003e\n\u003cp\u003eNo. They are designed around the collector and exhaust dimensions rather than a specific vehicle. Confirm that your headers use a compatible \u003cstrong\u003e3-inch 3-bolt collector\u003c\/strong\u003e and that your exhaust system uses \u003cstrong\u003e2.5-inch tubing\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch2\u003eAnswer-First Product Summary\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are these reducers?\u003c\/strong\u003e\u003cbr\u003eThese are a pair of \u003cstrong\u003e3-inch to 2.5-inch stainless steel header collector reducers\u003c\/strong\u003e designed to connect compatible \u003cstrong\u003e3-inch 3-bolt header collectors\u003c\/strong\u003e to 2.5-inch exhaust tubing. They are made from 18-gauge 304 stainless steel and include copper collector gaskets and mounting hardware.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWho are they for?\u003c\/strong\u003e\u003cbr\u003eThey are suitable for builders working on \u003cstrong\u003ehot rods, muscle cars, classic trucks, engine swaps, street machines, and custom exhaust systems\u003c\/strong\u003e where 3-inch headers need to transition into a 2.5-inch exhaust system.\u003c\/p\u003e","brand":"Certified Automotive Experts","offers":[{"title":"Default Title","offer_id":55942664061250,"sku":"CAE-3x2.5-COLLECTOR","price":250.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0716\/4664\/2498\/files\/66887fb9-c6b6-451e-812b-e247ac004ba7.jpg?v=1789882271"},{"product_id":"header-collectors","title":"Header Collectors 2.5\" 3 Bolt Flange Inlet 2.5\" Outlet Pair","description":"\u003ch2\u003e2.5-Inch Stainless Steel Exhaust Header Collectors with O2 Sensor Bungs\u003c\/h2\u003e\n\u003cp\u003eComplete your custom exhaust system with these \u003cstrong\u003e2.5-inch stainless steel exhaust header collectors with integrated oxygen sensor bungs\u003c\/strong\u003e. Designed for headers using a standard \u003cstrong\u003e2.5-inch 3-bolt collector flange\u003c\/strong\u003e, these collectors provide a durable connection between your headers and exhaust tubing while giving you a convenient location for installing an oxygen sensor.\u003c\/p\u003e\n\u003cp\u003eEach collector features a \u003cstrong\u003efull 2.5-inch inlet and 2.5-inch outlet\u003c\/strong\u003e, helping maintain consistent exhaust flow without reducing the collector diameter. The welded O2 sensor bung is supplied with a threaded plug and can accommodate \u003cstrong\u003enarrowband or wideband oxygen sensors\u003c\/strong\u003e, making these collectors suitable for EFI systems, engine tuning, and custom exhaust applications.\u003c\/p\u003e\n\u003ch3\u003eAdjustable O2 Sensor Positioning\u003c\/h3\u003e\n\u003cp\u003eA key feature of these stainless steel header collectors is the \u003cstrong\u003efixed welded flange design\u003c\/strong\u003e. The collector can be bolted to the header in multiple orientations, allowing you to choose from \u003cstrong\u003ethree different clocking positions\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThis positioning flexibility makes it easier to locate the oxygen sensor where it has better clearance from the \u003cstrong\u003echassis, steering components, transmission, engine, and other exhaust components\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eBuilt for Custom Exhaust Systems\u003c\/h3\u003e\n\u003cp\u003eConstructed from \u003cstrong\u003ecorrosion-resistant stainless steel\u003c\/strong\u003e, these 2.5-inch exhaust collectors are designed for long-term durability in demanding automotive applications. They are well suited for \u003cstrong\u003eLS swaps, muscle cars, hot rods, street rods, race cars, engine swaps, and custom fabricated exhaust systems\u003c\/strong\u003e using a compatible 2.5-inch three-bolt collector flange.\u003c\/p\u003e\n\u003cp\u003eWhether you're building a new exhaust system or modifying an existing header setup, these collectors provide a practical connection point while maintaining the 2.5-inch exhaust diameter and providing an integrated O2 sensor mounting location.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e2.5-inch inlet and 2.5-inch outlet\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDesigned for \u003cstrong\u003e2.5-inch 3-bolt header collector flanges\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIntegrated welded \u003cstrong\u003eoxygen sensor\/O2 bung\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCompatible with \u003cstrong\u003enarrowband and wideband O2 sensors\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIncludes threaded O2 bung plugs\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eThree selectable O2 sensor clocking positions\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eHelps improve clearance around steering, chassis, transmission, and exhaust components\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eStainless steel construction for corrosion resistance and durability\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSuitable for custom exhaust fabrication and header applications\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eIdeal for \u003cstrong\u003eLS swap headers, muscle cars, hot rods, street rods, race cars, and engine swaps\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePackage Includes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e2 × Stainless Steel Header Collectors\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e2 × Copper Collector Gaskets\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e6 × Collector Bolts\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e6 × Locking Flange Nuts\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e2 × O2 Bung Plugs Installed\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat size exhaust headers do these collectors fit?\u003c\/strong\u003e\u003cbr\u003eThese collectors are designed for headers equipped with a \u003cstrong\u003estandard 2.5-inch 3-bolt collector flange\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the inlet and outlet size?\u003c\/strong\u003e\u003cbr\u003eBoth the inlet and outlet are \u003cstrong\u003e2.5 inches\u003c\/strong\u003e, allowing the exhaust system to maintain the collector diameter without a built-in reduction.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo these collectors have oxygen sensor bungs?\u003c\/strong\u003e\u003cbr\u003eYes. Each collector has a \u003cstrong\u003ewelded oxygen sensor bung with a threaded plug\u003c\/strong\u003e, allowing installation of a narrowband or wideband O2 sensor.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I change the O2 sensor position?\u003c\/strong\u003e\u003cbr\u003eYes. The collector can be bolted to the header in different orientations, providing \u003cstrong\u003ethree clocking positions\u003c\/strong\u003e to help position the O2 sensor and improve component clearance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre these collectors suitable for LS swaps?\u003c\/strong\u003e\u003cbr\u003eYes. They are commonly used with \u003cstrong\u003eLS swap shorty headers and custom exhaust systems\u003c\/strong\u003e, provided the header uses a compatible 2.5-inch three-bolt collector flange.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are these exhaust collectors made from?\u003c\/strong\u003e\u003cbr\u003eThey are constructed from \u003cstrong\u003ecorrosion-resistant stainless steel\u003c\/strong\u003e for durability and long service life.\u003c\/p\u003e","brand":"Certified Automotive Experts","offers":[{"title":"Default Title","offer_id":56031707889986,"sku":"CAE-2.5x2.5-COLLECTOR","price":79.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0716\/4664\/2498\/files\/2.5_Stainless_Exhaust_Header_Collectors_with_O2_Bung.jpg?v=1788435398"}],"url":"https:\/\/certifiedautomotiveexperts.com\/collections\/collectors.oembed","provider":"Certified Automotive Experts","version":"1.0","type":"link"}