High Energy Hydraulic lifters have a patented constant orifice metering valve that precisely meters oil to the rocker arms. Continuous contact between the metering valve and pushrod seat is maintained, eliminating excessive oiling at high engine speeds. The pushrod seat is made of a special powdered metal iron alloy that is heat-treated for strength and wear resistance. In addition, High Energy Lifters have a lightweight check valve disc that allows for quicker response, which results in increased engine speed before valve float. This check valve disc also maintains added control at all engine speeds and loads. COMP Cams High Energy Hydraulic Lifters also contain a longer piston than conventional Hydraulic lifters, which provides more load bearing surface and increases lifter longevity. PartNumber : cca852-12 Description : High Energy Hydraulic Lifters; 12 Pieces Title : 852-12 Hydraulic Lifters, Oldsmobile/ Pontiac Weight : 97g Diameter : .842" Seat Height : 2.05" 1974 Chevrolet Camaro Base V8.5736cc Engine Components::Lifters 1972-1973 Chevrolet Camaro Base V8.5737cc Engine Components::Lifters 1973 Chevrolet Camaro LT V8.-cc Engine Components::Lifters 1974 Chevrolet Camaro LT V8.5736cc Engine Components::Lifters 1972-1973 Chevrolet Camaro RS V8.5736cc Engine Components::Lifters 1972 Chevrolet Camaro SS V8.5736cc Engine Components::Lifters 1973 Chevrolet Camaro Z28 V8.-cc Engine Components::Lifters 1974 Chevrolet Camaro Z28 V8.5736cc Engine Components::Lifters 1972 Chevrolet Camaro Z28 V8.5737cc Engine Components::Lifters 1973 Chevrolet Malibu Base V8.5737cc Engine Components::Lifters 1973 Chevrolet Malibu Estate V8.5737cc Engine Components::Lifters 1977-1979 Oldsmobile Custom Cruiser Base V8.-cc Engine Components::Lifters 1968-1974 Oldsmobile Toronado Base V8.7456cc Engine Components::Lifters 1971-1976 Oldsmobile Toronado Brougham V8.-cc Engine Components::Lifters 1968-1970 Oldsmobile Toronado Custom V8.-cc Engine Components::Lifters 1975-1976 Oldsmobile Toronado Custom V8.-cc Engine Components::Lifters 1967-1969 Pontiac Grand Prix Base V8.7014cc Engine Components::Lifters 1976 Pontiac LeMans Base V8.-cc Engine Components::Lifters 1980-1981 Pontiac LeMans Base V8.-cc Engine Components::Lifters 1980-1981 Pontiac LeMans Safari V8.-cc Engine Components::Lifters 1976 Pontiac LeMans Sport V8.-cc Engine Components::Lifters