ARP 134-3609 Cylinder Head Bolt Kit for 1998-2003 GM Gen III LS1 LS6 4.8L 5.3L 5.7L 6.0L EnginesChevrolet Gen III LS Series small block (2003 & earlier) *3 different length bolts* Fastener Style: Bolt Undercut Stud: No Head Style: Hex Fastener Material: Chromoly Fastener Finish: Black oxide Washers Included: Yes Cut to Fit: No All Pro Series bolts are cold forged to ensure molecular integrity, heat treated prior to thread rolling and machining, and are rated nominally at 200,000 psi. ARP Pro Series head bolt kits are application specific