Features precision-hardened ball-type check valve to provide superior sealing and lash control Valve seal is self-cleaning, making it less susceptible to noise caused by oil contamination Lifter body and roller are heat-treated for improved strength and wear resistance Plunger is precision-ground and select-fitted to a tolerance in the millionths-of-an-inch for quieter operation Made in the U.S.A.. LIFTER STD 91-99 XL
