Summit Racing™ Extreme Duty Header Bolt kits

Summit Racing™ Extreme Duty exhaust manifold header bolts are engineered to withstand the stress and abuses that high-horsepower engines endure. These fastener kits come with all necessary studs, nuts, washers, lubricant, and instructions to ensure maximum performance and reliability. Order the hardware recommended for your year/make and engine application.

Extreme Duty fasteners feature:

* Tensile strengths above 170,000 psi
* High-strength chromoly steel utilized for all products
* Precision manufacturing processes ensure consistent product performance
* All studs are twice straightened to guarantee straightness
* Threads are rolled after heat treatment for high strength
* Tensile and yield strength tested after thread rolling
* Uniformly applied black oxide surface finish
* Anti-rust oil coating to protect fasteners from corrosion
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