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. Thread Size - 7/16 in. Head Style - Hex. Fastener Material - Chromoly. Fastener Finish - Black oxide. Washers Included - Yes. Application. Make - Oldsmobile. Year - 1965-1976. Engine Type - L4. Engine Size - 5.7L/350, 6.6L/400, 7.0L/425, 7.5L/455. Cylinder Head Style - Stock configuration, Edelbrock Performer RPM. Engine Family - Oldsmobile V8.
This ARP High Performance series head bolt kits are tough They are rated at 170,000 psi
15 percent stronger than Grade 8 fasteners
