Erson Cams new Black Magic extreme load roller lifters utilize full-time pressurized oiling to the lifter wheel, which creates an oil wedge between the axle and wheel for dramatically improved load bearing capability. A special .470" diameter axle made from advanced, high strength B624L matrix material is employed with the pressurized oiling. This design results in an .842" lifter which has the load bearing capacity of a much larger 1.00" roller lifter. Open pressure rating is 2500 lbs. maximum and seat pressure is 550 lbs. max. The Lifter body is treated with DLC (Diamond Like Coating) for reduced friction and increased wear durability. Erson Black Magic lifters are made in the USA and are fully rebuildable. They are available in on-center and offset configurations for Small Block Chevy and Big Block Chevy, and on-center for LS engines.   For more information head over to Erson's page >>HERE<<