FEULING OIL PUMP CORP. Lifters Race Series Twin Cam 4052ST

Full-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.