Designed for drag race applications using Yates heads, these Solid Roller Lifters from COMP Cams® are engineered to withstand the demands of aggressive cam lobe designs and increased RPM ranges. They feature a wear resistant tool steel axle, precision sorted needle bearings and EDM Oil Injection™ Technology that guarantees the bearing assembly receives a constant flow of oil. Endure-X™ Solid Roller Lifters are heat treated, machined to ultra-high tolerances and fully rebuildable.