Rollers have a larger-than-stock inner bearing race that reduces stress and increases axle lifeEach lifter body and plunger assembly is hand-fit and pressure-tested to ensure correct operationRedesigned plunger assembly withstands forces associated with heavy-duty valve springs and pushrods typically used in high-performance applicationsRevised metering device precisely controls oil delivery to top end, ensuring rapid lifter pump-up and reducing possibility of oil starvation to bottom endMade in the USAHL2T (Hydraulic Lifter Limited Travel) kit is designed to limit the travel of hydraulic lifters in an engine, making them function more like solid lifters at higher rpms.