Hardened Steel Roller Style

PART #
CB795R Chevy V6 & V8 200-400 Engines (1955-86)
CB945R Big Block Chevy 396-454 Engines (1965-95)

Solid T6-6061 Billet Aluminum Style

PART #
CB590A Chevy 265-400 (Thin Timing Cover)
CB678A Big Block Chrysler & Hemi w/3 Bolt Gear
CB795A Chevy V6 & V8 200-400 Engines (1955-86)
CB945A Big Block Chevy 396-454 Engines (1965-95)

Since all roller cam lobes are ground flat instead of tapered like a hydraulic or solid cam, it is necessary to provide some means of holding the cam back to the rear of the engine. The thrust button rides between the front of the timing gear and the back of the front cover, and can be shimmed for proper end play in the cam. CVR has available both the solid aluminum button and the roller thrust bearing, for the ultimate in performance.