Small Block 305 & 350, Use in Blocks Originally Equipped w/ Hydraulic Roller Cam (1987-Present Including LT1 & LS Series), Reduced Travel, OE Type

• Designed to perform at higher engine speeds

• When equipped with hydraulic lifters, high rpm is limited by improper position of lifter’s internal piston as lifter “pumps up”

• Improper location results in open valves that lead to lost power and possibly engine failure

• Minimize internal piston movement to allow higher engine rpm