S/S Header Bolt Kit - 3/8 x 1.00 UHL (12)

The S/S Header Bolt Kit - 3/8 x 1.00 UHL (12) from ARP is an essential fastening solution for serious engine builders and performance mechanics. This kit is designed for assembling high-heat exhaust manifolds and headers, ensuring reliability under extreme thermal cycling and vibration conditions. Whether you're building a street engine, prepping for track duty, or restoring a classic vehicle, this kit provides the necessary durability.

Constructed from stainless steel, these bolts resist corrosion and maintain clamping force across repeated heat cycles, offering a significant advantage over mild steel alternatives. The 3/8-inch diameter and 1.00 UHL (under head length) specification guarantee proper engagement with OEM or performance header flanges, preventing issues such as bottoming out or compression losses. This design helps to distribute load more uniformly, reducing the risk of gasket leakage or bolt stretch.

Engine enthusiasts installing cast or fabricated headers on LS, small-block Chevy, Ford, or Mopar platforms will find this kit invaluable. It ensures consistency and reliability during installations, making it a go-to choice whenever header gaskets are replaced or during engine rebuilds. With this kit, you can trust that your header installation will perform optimally.