Brand: ARP

Manufacturer's Part Number: 300-8245

Part Type: Rocker Arm Nuts

Product Line: ARP Perma-Loc Rocker Arm Adjusters



Rocker Arm Style: Full roller

Rocker Arm Nut Style: Polylock

Rocker Stud Thread Diameter: 7/16-20 in.

Overall Height (in): 1.200 in.

Shank Diameter (in): 0.550 in.

For Use with Stud Girdle: No

Quantity: Sold as a set of 16.

Notes: Designed for use with aluminum body roller rocker arms.


Stop your rocker arms from loosening forever with these ARP Perma-Loc rocker arm adjusters. Made from heat-treated, premium-grade 8740 chromoly steel, these adjusters provide 190,000 psi tensile strength for the utmost in reliability. Other features include exclusive heads with special shouldered stops to hold the adjusting wrench, precision CNC-machined threads to ensure optimum seat pressure, flush-machined set screws for proper contact on the studs, and, best of all, they don't require any special tools for installation.