V-Thunder™ Tappet Assembly – Twin Cam

Features an oil metering design that provides uniform metering throughout the entire rpm range; Rollers and axles are manufactured from high-carbon/chromium bearing-quality steel, which is through-hardened for improved wear and load-carrying capability, and the pushrod seat is carbo-nitrided; Each unit is 100% tested for proper function; HY-REV™ hydraulic roller lifter features internal hydraulic check valve, which allows for higher rpm; Made in the U.S.A.; PRO-MAGNUM™ hydraulic roller lifter requires adjustable pushrods.