Engine › HYDRAULIC HP+ ROLLER LIFTERS HYDRAULIC HP+ ROLLER LIFTERS $0.00 Performance hydraulic roller liftersOptimized oil flow to top end - valves, springs, rockers, shafts & valve guidesCooler oil and reduced wearExtends life of top end valve gearCNC machined and precision groundDrop in replacement for stock liftersDyno developed and track testedRecommended for use with the Feuling® Oil Pump or comparable high volume oil pumpMade in the U.S.A. Quantity: Purchase Added! Performance hydraulic roller liftersOptimized oil flow to top end - valves, springs, rockers, shafts & valve guidesCooler oil and reduced wearExtends life of top end valve gearCNC machined and precision groundDrop in replacement for stock liftersDyno developed and track testedRecommended for use with the Feuling® Oil Pump or comparable high volume oil pumpMade in the U.S.A.