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The COMP Cams Ultra Pro Magnum roller rocker arm is a stud-mount rocker with a 1.7 ratio and 3/8" stud for Chevrolet 348-409 ci V8 applications. Investment-cast 8650 chromemoly construction and black oxide finish improve strength and corrosion resistance. Oversized trunnions, precision-sorted needle bearings and hardened roller tips reduce inertia and support up to 850 lbs of open spring pressure for dependable valve-train service.
COMP Cams Rocker Arm348/409 Chevy 1.7 U
