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The COMP Cams Ultra Pro Magnum 1.7 ratio roller rockers for 1/2" studs are developed to stabilize big-block Chevy valve trains when used with the COMP Cams Hi-Tech 1/2" Rocker Stud Kit. By accepting larger studs, these rockers increase valve-train stiffness to support greater valve motion in BBC engines. The arched, web-like investment-cast design aims to balance strength and low inertia for reliable operation under high spring rates.
COMP Cams Rocker Arms CB 1.7 1/2in Ultra
