COMP Cams Pro-Mag Hydr Lifters AMC MT

Pro Magnum Hydraulic Flat Tappet Lifters. Specifications .904" Diameter - 107g Weight - 1.84" Seat Height. Specifically designed to perform at higher engine speeds. Proper position of internal piston at higher RPM prevents lifters from harmful "pumping up". Unique design yields significant power increase over standard hydraulic lifters. Adjustable valve train requiredPre-load .002"-.004" with engine warm. Applications: AMC V8 290-401, Chrysler, Small Block V8 273-360Big Block B Series 383-440 ('68+) These Pro Magnum hydraulic lifters are designed to perform at high RPM without any harmful pumping up. These lifters for Chrysler 273-360 and 383-440 yield significant power increase over standard hydraulic lifters.