Header Bolt Kit - 6pt. GM LS

The ARP Header Bolt Kit - 6pt. GM LS is engineered for professional engine builders, performance technicians, and serious automotive enthusiasts working on GM LS-series platforms. These fasteners secure the exhaust header to the cylinder head—a critical junction that experiences extreme heat cycling and vibration. ARP's premium chromoly construction and black oxide finish deliver reliability where OEM hardware often falls short, ensuring your header assembly remains tight and leak-free through sustained high-performance operation.

Each Header Bolt Kit contains 12 pieces measuring 8mm x 1.25 thread diameter with a 1.181-inch length, featuring a hex head design and integrated washers for consistent clamping load distribution. Manufactured from chromoly steel and finished in black oxide, these bolts resist corrosion and maintain structural integrity under the thermal stress that exhaust headers endure—temperatures that can exceed 1,200°F during sustained driving. The hex head geometry allows precise torque application using standard tools, while the included washers prevent fastener pull-through and reduce likelihood of header gasket failure.

This kit is essential for anyone rebuilding or upgrading the exhaust system on GM LS1, LS2, LS3, and related LS-platform engines commonly found in Corvettes, Camaros, Silverados, and high-performance swaps. Professional installers and engine builders rely on ARP fasteners to eliminate header leaks, reduce turbo lag, and maintain peak horsepower delivery—problems that become pronounced once stock hardware corrodes or loosens. Whether you're performing routine maintenance or a full engine refresh, the Header Bolt Kit - 6pt. GM LS delivers the holding power and durability expected in professional-grade motorsports and restoration work.