36-Piece Small Block Chevy Header Hardware Kit
Secure your exhaust installation with this 36-Piece Header Hardware Kit, designed for Small Block Chevy V8 applications. The kit includes high-strength header bolts, matching washers, and stainless steel collector hardware for reliable fastening and long-lasting durability.
The 12 header bolts and 12 washers are made from heat-treated 42CrMo alloy steel with Grade 8 specifications, providing dependable clamping strength under heat and vibration. Compact 5/16" hex heads allow easier tool access in tight engine bays and around block hugger-style headers.
A black phosphate and blackened finish helps resist corrosion, while the included 304 stainless steel collector bolts and nuts provide durability at exhaust connection points.
Key Features
- Complete 36-piece exhaust header hardware kit
- 12 heat-treated 42CrMo alloy steel header bolts
- 12 matching washers
- 6 stainless steel collector bolts and 6 nuts
- Grade 8 specification header bolts
- Compact 5/16" hex heads for tight-clearance installations
- Corrosion-resistant black-finished header hardware
- 304 stainless steel collector hardware
- Designed for Small Block Chevy V8 engines
Engine Compatibility
Designed for compatible Chevy Small Block V8 engines:
- 265, 283, 302, 305, 307, 327, 350, and 400 CID
Suitable for muscle cars, classic restorations, street rods, and performance builds.
Specifications
- Total Pieces: 36
- Header Bolts: 12
- Washers: 12
- Collector Bolts: 6
- Collector Nuts: 6
- Header Bolt Material: Heat-Treated 42CrMo Alloy Steel
- Collector Hardware: 304 Stainless Steel
- Bolt Head Size: 5/16" Hex
- Header Bolt Rating: Grade 8 Specification
- Finish: Black Phosphate/Blackened Coating
Installation Recommendations
Use anti-seize lubricant and follow the header or engine manufacturer's torque specifications. The supplied recommendation is 25–30 ft-lbs, but confirm the correct torque for your specific bolts and header application before tightening. Recheck fasteners after the initial heat cycle when appropriate.
Frequently Asked Questions
What is included in this kit?
The kit includes 12 header bolts, 12 washers, 6 collector bolts, and 6 collector nuts.
Which engines does this kit fit?
It is designed for compatible Small Block Chevy engines ranging from 265 to 400 CID. Verify your header's bolt and collector requirements before ordering.
Are the collector bolts stainless steel?
Yes. The collector bolts and nuts are made from 304 stainless steel.
What is the benefit of the compact hex head?
The 5/16" hex head helps improve tool access in confined engine bays and around header tubes.
Is this kit suitable for performance builds?
Yes. It is suitable for compatible street performance, restoration, muscle car, and custom exhaust applications.
Have questions about compatibility? Contact us with your engine and header details before ordering.
