This ARP High Performance series head bolt kits are tough! They are rated at 170,000 psi--15 percent stronger than Grade 8 fasteners. They comes with hex heads or reduced wrenching 12-point heads that eliminate the need for valvetrain removal when re-torquing cylinder heads.Features
- Fastener Style - Bolt.
- Head Style - Hex.
- Fastener Material - Chromoly.
- Fastener Finish - Black oxide.
- Washers Included - Yes.
- Make - Chevrolet.
- Year - 1966-2000.
- Engine Size - 7.4L/454, 7.0L/427, 6.6L/402, 6.5L/396.
- Cylinder Head Style - Dart Pro 1, World Products, Merlin, Bowtie aluminum, Pro Top Line.
- Engine Family - Chevy big block Mark IV, Chevy big block Gen V, Chevy big block Gen VI.