Race Series Hydraulic Lifters / '84-'99

Fits '84 - '99 Evo Big Twin and '86-'90 Sportster 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.