{"product_id":"12-piece-header-bolt-kit-for-sbc-3-8-16-x-1-00-black-grade-8-steel-compact-5-16-hex-flange-head-black-phosphate-coated-corrosion-resistant-fits-small-block-chevy-v8-265-283-302-305-307-327-350-400","title":"12pc SBC Header Bolts 3\/8-16 x 1\" Black Grade 8 Steel, 5\/16\" Hex","description":"\u003ch2\u003e\u003cspan\u003e12-Piece Small Block Chevy Header Bolt Set\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eSecure your exhaust headers with this \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e12-Piece Small Block Chevy Header Bolt Set\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, engineered for strength, durability, and easier installation in tight engine bays. Made from heat-treated \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e42CrMo alloy steel\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e to Grade 8 specifications, these bolts provide reliable clamping strength in high-heat, high-vibration exhaust environments.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe compact \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e5\/16\" hex heads\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e improve tool access around header tubes, making them ideal for block hugger headers, performance builds, and confined engine compartments. The integrated flange design distributes clamping force without requiring separate washers, while the black phosphate finish helps resist corrosion.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eKey Features\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\u003cspan\u003e12-piece header bolt set for Small Block Chevy engines\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHeat-treated 42CrMo alloy steel construction\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eGrade 8 specifications\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCompact 5\/16\" hex heads for tight-clearance installations\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIntegrated flange design eliminates separate washers\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBlack phosphate and blackened corrosion-resistant finish\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDesigned for reliable clamping under heat and vibration\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIdeal for restorations, muscle cars, street rods, and performance builds\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eEngine Compatibility\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eDesigned for compatible Chevy Small Block V8 engines:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\u003cspan\u003e265, 283, 302, 305, 307, 327, 350, and 400 CID\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eNote:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e This kit contains 12 bolts. Applications requiring 16 header bolts need a compatible 16-piece kit. Verify thread size, bolt length, and header compatibility before ordering.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eSpecifications\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eQuantity:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 12 Bolts\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eMaterial:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Heat-Treated 42CrMo Alloy Steel\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eStrength Specification:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Grade 8\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eHex Head Size:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 5\/16\"\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eDesign:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Integrated Flange\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eFinish:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Black Phosphate\/Blackened Coating\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003cspan\u003eApplication:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Compatible Small Block Chevy Headers\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eInstallation Recommendations\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eUse anti-seize lubricant and follow the header manufacturer's torque specifications. A torque range of \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e25–30 ft-lbs\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is provided as a reference, but confirm the correct value for your specific application before installation. Recheck fasteners after the initial heat cycle when appropriate.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eFrequently Asked Questions\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eHow many bolts are included?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eThis set includes 12 header bolts.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eWhich engines are compatible?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eIt is designed for compatible Small Block Chevy V8 engines from 265 to 400 CID. Verify your header's bolt requirements before ordering.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eDo these bolts require separate washers?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eNo. The integrated flange design eliminates the need for separate washers.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eAre these bolts suitable for block hugger headers?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eYes. The compact 5\/16\" hex heads help improve tool access in tight-clearance installations.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cstrong\u003e\u003cspan\u003eIs this a 16-piece kit?\u003c\/span\u003e\u003c\/strong\u003e\u003cbr\u003e\u003cspan\u003eNo. This is a 12-piece set. Applications requiring 16 bolts need a separate compatible kit.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eNeed help confirming fitment?\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Contact us with your engine and header details before ordering.\u003c\/span\u003e\u003c\/p\u003e","brand":"Certified Automotive Experts","offers":[{"title":"Default Title","offer_id":67690029875522,"sku":"CAE-HBS-12-B","price":19.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0716\/4664\/2498\/files\/5d04f10d-9ee6-4590-9a96-3d7803537c05.jpg?v=1791472331","url":"https:\/\/certifiedautomotiveexperts.com\/products\/12-piece-header-bolt-kit-for-sbc-3-8-16-x-1-00-black-grade-8-steel-compact-5-16-hex-flange-head-black-phosphate-coated-corrosion-resistant-fits-small-block-chevy-v8-265-283-302-305-307-327-350-400","provider":"Certified Automotive Experts","version":"1.0","type":"link"}