ARP GM/LS Cylinder Head Bolt Kit 2003 & earlier

Pro Series bolts are cold forged to ensure integrity. They are heat treated prior to thread rolling and machining. Bolts are rated at 200,000 psi. For accurate torque readings and even load distribution, hardened and parallel-ground washers are included with each kit. Pro Series head bolts have a reduced wrenching hex and a wide area flange. For 1997-2003 LS engines and some 2004 LS engines using "unequal length" bolts.