ARP PN: 134-3610 Applications - Chevrolet Small Block Gen III, IV/LS Series small block (2004 & later - except LS9) w/ all same length hex bolts These Pro series cylinder head bolts from ARP are cold-forged to ensure molecular integrity. They are heat-treated prior to thread rolling and machining, and are rated at a whopping 190,000 psi. All kits come complete with hardened parallel washers for even load distribution and accurate torque readings.
