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The COMP Cams Ultra Pro Magnum XD rocker arm set is a stud-mount upgrade for Chevrolet small-block engines, supplied as a set of eight. Machined from 8650 steel with billet pushrod seat inserts, these rebuildable rockers use precision-sorted needle bearings and hardened roller tips to manage heavy spring loads while accepting most spring diameters and retainers. Intended for 3/8" stud, 1.65 ratio Chevrolet applications.
COMP Cams Rockers CS 1.65 3/8in Ultra Pro
