Pro Series Cylinder Head Bolt Kit

The ARP Gen 134-3610 is a Pro Series cylinder head bolt kit specifically engineered for Gen III/Gen IV LS engines, including Chevy LS Series applications from 2004 and later. These bolts are crafted from 8740 chromoly steel, a material renowned for its strength and durability in high-performance engine applications. To ensure optimal performance and longevity, ARP cold-forges these bolts to guarantee molecular integrity. They undergo a rigorous heat-treatment process before thread rolling and machining, contributing to their impressive 190,000 psi tensile strength rating. This robust construction provides superior clamping force necessary for maintaining head gasket seal under demanding conditions. The kit includes hardened parallel washers, which are crucial for distributing load evenly and ensuring accurate torque readings during installation. Available with either hex or 12-point heads, these black-finished bolts offer versatility for different engine builds and tool accessibility. The kit is sold as a complete set, simplifying the ordering process for engine rebuilds or performance upgrades.