ARP High Performance series head bolt kits are tough. They are rated at 170,000 psi--15 percent stronger than Grade 8 fasteners. They come available with hex heads or reduced wrenching 12-point heads that eliminate the need for valvetrain removal when re-torquing cylinder heads.
SPECS
Fastener Style: Bolt
Undercut Stud: No
Head Style: Hex
Fastener Material: Chromoly
Fastener Finish: Black oxide
Washers Included: Yes
Cut to Fit: No
