COMP Cams Endure-X Solid Roller Lifters are engineered to withstand the demands of aggressive cam lobe designs and increased rpm ranges. Endure-X Solid Roller Lifters are heat-treated, machined to ultra-high tolerances and fully rebuild able. COMP Cams patented link bar design combines the benefits of a removable link bar with the safety of a captured link bar. EDM Oil Injection technology guarantees the bearing assembly receives a constant flow of pressurized oil via a precision hole aimed directly at the needle bearings. Precision sorted needle bearings distribute load evenly preventing premature wear and failure. The wear resistant tool steel axle prolongs the life of the roller assembly, particularly in high rpm applications.