4052ST Race Series Short Travel Hydraulic Lifters - +0.8435-0.844in Oversize for High Performance Engines - Perfect for Racing, Hot Rods, and Engine Rebuilds

Short-travel hydraulic lifters made from machined steel. Exceed the needs of large-lift camshafts and higher spring pressures with a slower bleed-down rate. Maintain proper and critical oil flow to valves, springs, rockers, shafts and valve guides. Increase engine RPM and valvetrain stability; decreases valve float for maximum valve lift. Recommended for both strip and performance street engines. Made in the U.S.A. High-volume oil pump recommended. Recommended for engines running higher than 185 lb. valve spring seat pressure.