High Performance Head Bolt Kit

The ARP 134-3609 Head Bolt Kit is engineered for robust performance and reliability in 1997-2003 Gen III LS engines. These High Performance series bolts boast a tensile strength of 180,000 psi, providing 15% greater strength than standard Grade 8 fasteners, ensuring superior clamping force for your cylinder heads. Designed for convenience and improved serviceability, the kit features fasteners with either a reduced wrenching hex head or a 12-point head. This design choice is crucial as it can eliminate the need to remove the valvetrain components when re-torquing the cylinder heads, simplifying maintenance and reducing downtime. The exterior finish is a durable Black Oxide, and the bolts have a thread size of 0.65 inches. This head bolt kit is suitable for a range of Gen III LS applications, including 4.8L, 5.3L, 5.7L, and 6.0L engines, specifically mentioning LS1, LS6, LQ4, and LQ9 variants. They are designed for street, off-road, and Powersports use, offering a Grade 1 manufacturer grade. Installation instructions recommend lubricating the threads and bolt heads with ARP Ultra-Torque Fastener Assembly Lubricant before tightening to hand tight.