Pro 12-Point Flange Head Bolts

The ARP Pro Series head bolt kit is engineered for 1997-2003 Gen III/Gen IV LS engines, offering a robust solution for cylinder head attachment. Constructed from ARP2000 material, these bolts boast a tensile strength of 220,000 psi, surpassing standard Grade 8 fasteners by 15 percent and achieving a rating of 180,000 psi. This enhanced strength is crucial for maintaining proper clamping force under demanding engine conditions. The kit provides a choice between a reduced wrenching hex head or a 12-point head design. This thoughtful engineering allows for easier access and installation, potentially eliminating the need to remove the valvetrain for cylinder head re-torquing. This feature streamlines maintenance and tuning processes for LS engine enthusiasts. Installation instructions recommend lubricating the bolt threads and the underside of the bolt heads with ARP Ultra-Torque Fastener Assembly Lubricant before installation. While specific torque sequences are often engine-dependent and may require consulting additional documentation, the superior material and design of these ARP bolts ensure reliable performance for a wide range of LS engine applications.