Developed for serious racing applications, the pressurized oiling system of these lifters provides constant lubrication through the axle and to the needles. This reduces wear in the axle and increases the durability of the lifter. Also for increased durability, all surfaces are hardened and polished, which makes the body stronger and smoother while reducing friction. These lifters are available in standard height and +.300? height with centered and +.180? offset versions. The solid vertical bar roller lifters with pressurized oiling are held to higher standards than the competition for the ultimate in race lifters.