Stainless Steel Header Collector Bolt Kit – M10 x 1.5 x 40mm, 12-Piece
Upgrade your exhaust installation with the Certified Automotive Experts Stainless Steel Header Collector Hardware Kit, designed for secure and reliable connections between exhaust header collector flanges. This complete 12-piece exhaust header bolt kit includes six M10 x 1.5 x 40mm serrated flange bolts and six matching M10 x 1.5 serrated flange nuts, all manufactured from durable 304 stainless steel.
Designed for demanding automotive environments, these stainless steel exhaust fasteners provide excellent corrosion resistance and long-term durability compared with conventional zinc-plated hardware. The serrated flange design helps resist loosening caused by engine vibration, road impacts, and repeated exhaust heat cycles, making this kit a practical choice for performance exhaust systems and custom fabrication.
The integrated flange on each fastener helps distribute clamping force across the collector flange surface while eliminating the need for separate washers. With six bolts and six matching nuts, this kit provides enough hardware for two 3-bolt header collector flanges.
Key Features
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Complete 12-piece exhaust header collector hardware kit
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Includes 6 M10 x 1.5 x 40mm serrated flange bolts
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Includes 6 M10 x 1.5 serrated flange nuts
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Made from corrosion-resistant 304 stainless steel
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A2-70 stainless steel specification
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Serrated flange design helps resist loosening from vibration
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Wide flange distributes clamping force across the collector flange
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Integrated flange eliminates the need for separate washers
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Suitable for repeated exhaust heat cycles
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Designed for two 3-bolt collector flanges
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Ideal for new exhaust installations, repairs, and custom fabrication
304 Stainless Steel Construction
These header collector bolts and nuts are manufactured from 304 stainless steel, providing excellent resistance to corrosion in automotive environments exposed to heat, moisture, road debris, and changing temperatures.
Compared with conventional zinc-plated hardware, stainless steel provides a durable solution for exhaust applications where long-term exposure to heat and moisture can cause ordinary fasteners to deteriorate.
Serrated Flange Design
The serrated flange surfaces are designed to provide additional resistance against fastener loosening.
Exhaust systems experience constant vibration and repeated thermal expansion and contraction. The serrated flange design helps maintain a secure connection during these conditions while the integrated flange distributes clamping pressure across the collector flange.
The flange also means you don't need to install separate washers with these fasteners.
Ideal for Custom Exhaust Applications
This stainless steel header collector hardware kit is suitable for a wide range of automotive exhaust applications, including:
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Exhaust header collector flanges
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3-bolt header collectors
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Y-pipe connections
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Custom exhaust fabrication
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Performance exhaust systems
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Exhaust repairs
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Street cars
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Hot rods
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Muscle cars
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Classic cars and trucks
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Off-road vehicles
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Racing and competition applications
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Engine swap projects
What's Included?
12-piece complete hardware kit:
The quantity is designed to provide hardware for two 3-bolt exhaust collector flanges.
Product Specifications
| Specification |
Details |
| Product Type |
Exhaust Header Collector Hardware Kit |
| Quantity |
12 Pieces |
| Bolt Quantity |
6 |
| Nut Quantity |
6 |
| Thread Size |
M10 x 1.5 |
| Bolt Length |
40mm |
| Hex Size |
15mm |
| Material |
304 Stainless Steel |
| Stainless Grade |
A2-70 |
| Bolt Standard |
GB5789 |
| Nut Standard |
DIN6923 |
| Flange Type |
Serrated |
| Application |
Exhaust Header Collector |
| Designed For |
Two 3-Bolt Collector Flanges |
Why Use Stainless Steel Header Collector Hardware?
Header collector fasteners operate in a demanding environment where high temperatures, vibration, moisture, and road conditions can affect conventional hardware.
This 304 stainless steel exhaust bolt and nut kit provides a durable fastening solution while the serrated flange design helps reduce the chance of loosening during repeated driving and exhaust heat cycles.
For builders installing new headers, repairing an existing exhaust system, or fabricating a custom exhaust, having the correct matching collector hardware can make installation faster and more reliable.
Installation
Before installation, verify that your header collector flanges are compatible with M10 x 1.5 fasteners and that the 40mm bolt length is appropriate for your application.
Always follow the header manufacturer's recommended installation procedure and torque specifications. Inspect the collector flange and fasteners before installation to ensure all mating surfaces are clean and properly aligned.
Professional installation is recommended when working on custom or performance exhaust systems.
Frequently Asked Questions
What size are these header collector bolts?
The bolts are M10 x 1.5 x 40mm.
How many bolts and nuts are included?
The kit contains 6 bolts and 6 matching nuts, for a total of 12 pieces.
What material are the fasteners made from?
Both the bolts and nuts are made from 304 stainless steel, specified as A2-70.
How many collector flanges can this kit cover?
The six bolts and six nuts are designed to provide hardware for two 3-bolt header collector flanges.
Do the bolts have serrated flanges?
Yes. The bolts feature serrated flange surfaces designed to help resist loosening from vibration and repeated exhaust heat cycles.
Are washers included?
Separate washers are not required because the bolts and nuts feature integrated flange surfaces designed to distribute clamping force.
What can these bolts be used for?
They are suitable for header collector flanges, Y-pipe connections, custom exhaust fabrication, performance exhaust systems, exhaust repairs, and other compatible automotive applications.
Are these bolts universal?
They are not vehicle-specific, but you should verify the required M10 x 1.5 thread size, bolt length, flange clearance, and application requirements before ordering.
Fitment & Compatibility
This is a universal exhaust hardware kit, not a vehicle-specific component.
Before ordering, confirm:
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Your collector uses M10 x 1.5 fasteners
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40mm bolt length is suitable for your flange thickness
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The 15mm hex size has adequate installation clearance
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The flange and nut dimensions are compatible with your exhaust system
Answer-First Product Summary
What is this product?
This is a 12-piece stainless steel exhaust header collector hardware kit containing six M10 x 1.5 x 40mm serrated flange bolts and six matching M10 x 1.5 serrated flange nuts.
What is it used for?
It is designed for securing compatible exhaust header collector flanges, including two 3-bolt collector connections.
What material is it made from?
The bolts and nuts are manufactured from 304 stainless steel (A2-70) for corrosion resistance and durability in demanding automotive environments.
Does it include enough hardware for two 3-bolt collectors?
Yes. The kit includes six bolts and six nuts, providing hardware for two 3-bolt collector flanges.
