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The COMP Cams Magnum Roller Rocker Arm for AMC, Ford (non-rail) and Oldsmobile V8 applications covers AMC 290–401, non-rail Ford 289–351W and Olds 260–455 engines with a 1.6:1 ratio on 3/8" studs. Made from 8620 chromemoly steel with a roller tip, it reduces friction and resists flex while improving valve lift accuracy. Intended for street engines with spring pressures under 350 lbs, it serves as a dependable direct-fit upgrade.
COMP Cams Magnum Roller Rocker FS/Olds
