"Revolution XR4" Roller cam Our latest design roller profile for use with newer high flow turbos in stroker motor. Specs: Intake 220 @ .050 .527 lift Exhaust 224 @ .050 .542 lift (lift with stock rocker ratio) 113 L/S Best max effort street/strip cam with 3500+ converter Rough (but not too bad) idle and good drivability. STRONG midrange top end power. Roller rockers recommended