arp cylinder head bolt, hex head, high performance, 8740 black, 190000psi, gen iii ls series sb (2004 & later, except ls9), kit

The 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. The Pro Series are also available with hex and 12-point heads. All kits come complete with hardened parallel washers for even load distribution and accurate torque readings.