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The COMP Cams Ultra Pro Magnum roller rocker arm is a stud-mount rocker with a 1.7 ratio and 7/16" stud, intended for Chevrolet big-block V8 396-454 ci applications. Investment-cast 8650 chromemoly construction and a black oxide finish improve rigidity and corrosion resistance. Oversized trunnions, precision-sorted needle bearings and hardened roller tips reduce inertia and provide reliable operation with spring loads up to 850 lbs.
COMP Cams Rocker Arm CB 1.7 7/16 Ultra
