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ARP Perma-Loc Rocker Arm Adjusters

4.89 out of 5 stars 64 Customer Reviews

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.

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ARP Perma-Loc Rocker Arm Adjusters 300-8248

Made in the USA ARP Perma-Loc Rocker Arm Adjusters 300-8248

ARP Perma-Loc Rocker Arm Adjusters 300-8248

Rocker Arm Adjusters, 12-Point, Stud Girdle, 7/16 -20 Thread, 16 Pieces

Part Number: ARP-300-8248

Not Yet Reviewed

Estimated Ship Date: Oct 20, 2025 if ordered today

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Estimated Ship Date: Oct 20, 2025 if ordered today

ARP Perma-Loc Rocker Arm Adjusters 300-8247

Made in the USA ARP Perma-Loc Rocker Arm Adjusters 300-8247

ARP Perma-Loc Rocker Arm Adjusters 300-8247

Rocker Arm Adjusters, 12-Point, Stud Girdle, 7/16 -20 Thread, 16 Pieces

Part Number: ARP-300-8247

Not Yet Reviewed

Estimated Ship Date: Nov 6, 2025 if ordered today

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Estimated Ship Date: Nov 6, 2025 if ordered today

ARP Perma-Loc Rocker Arm Adjusters 300-8249

Made in the USA ARP Perma-Loc Rocker Arm Adjusters 300-8249

ARP Perma-Loc Rocker Arm Adjusters 300-8249

Rocker Arm Nuts, 12-Point, Roller Rockers, 7/16 in.-20 Thread, 2.050/2.615 in. Height, 0.750 in. O.D., BBC, Set of 16

Part Number: ARP-300-8249

Not Yet Reviewed

Estimated Ship Date: Oct 20, 2025 if ordered today

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Estimated Ship Date: Oct 20, 2025 if ordered today

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