Edelbrock 3790 Edelbrock Performer-Plus Camshaft and Lift Kit Designed for increased horsepower and optimum torque from the low-end to the mid-range Basic operating RPM range is idle-5,500 Intake valve lift with factory rocker arm ratio is 0.420" and exhaust valve lift is 0.442" Intake duration at 0.050 lift is 204 and the exhaust duration is 214 Retainers, locks, valve stem seals, timing chain and gears, pushrods, rocker arms, gaskets and lifters are not included