ARP High Performance Series head bolt kits are tough. They are rated at 180,000 psi--15 percent stronger than Grade 8 fasteners. They come available with a reduced wrenching hex head or 12-point head that help eliminate the need for valvetrain removal when re-torqueing cylinder heads.
Fastener Style: Bolt
Undercut Stud: No
Head Style: Hex
Fastener Material: Chromoly
Fastener Finish: Black oxide
Washers Included: Yes
Sold as a kit.
Designed to fit cast iron factory-style cylinder heads.