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A complete 1/2" rocker stud and trunnion retrofit kit for Ultra Pro Magnum and Ultra Pro Magnum XD rockers, this COMP Cams kit replaces 7/16" studs with 1/2" ARP studs and includes replacement trunnions, bearings, polylocks and snap rings. It was designed to increase valve-train stiffness in SBC and BBC engines, originally for NHRA Stock Eliminator applications, and contains all parts needed for the conversion.
COMP Cams Trunnion Kit1/2inUpm Type Rocker
