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Part fits the following years:1959, 1960, 1961, 1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973, 1974, 1975, 1976

1959-77 Catalina Rocker Arm Nuts, Perma-Loc Stud Girdle, 7/16" X 2.60", by ARP

Part# CH24065

Mfg# 300-8248

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SAVE: $21.96 Retail: $236.95

OPGI Price: $214.99


Brand: ARP
Part Type: (P) High Performance, designed to improve performance
Years: Sold As: KIT
2016 Catalina Catalog Page: 233
2017 Catalina Catalog Page: 240



  • NOTE1: These high-performance items are not eligible for any further discounts or promotional pricing.

ARP Perma-Loc rocker arm nuts are made not to loosen. Reason being, the adjuster body is heat-treated all the way through (not just casehardened), which eliminates "thread" movement. The threads are machined exactly perpendicular to the bottom of the adjuster, so it seats evenly and applies pressure on a full 360° circle. The screw is machined flush on the bottom (not pointed) to have optimum contact on the rocker arm stud.

Make & ModelYear RangeApplication Details
Chevrolet Chevelle1964-1977 2.60" Length
Chevrolet Malibu1978-1988 2.60" Length
Chevrolet El Camino1964-1977 2.60" Length
Chevrolet El Camino1978-1988 2.60" Length
Chevrolet Monte Carlo1970-1977 2.60" Length
Chevrolet Monte Carlo1978-1988 2.60" Length
Pontiac GTO1961-1973 2.60" Length
Pontiac LeMans1961-1973 2.60" Length
Pontiac Tempest1961-1973 2.60" Length
Pontiac Grand Prix1959-1977 Stud Girdle, 7/16" X 2.60"
Pontiac Catalina1959-1977 Stud Girdle, 7/16" X 2.60"
Pontiac Bonneville1959-1977 Stud Girdle, 7/16" X 2.60"
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