The Edelbrock Performer RPM Camshaft and Lift Kit are the heart of the total power package. Edelbrock designs them to perfectly match the power band of their Performer RPM Series of intake manifolds. They do this by testing and tuning them together on engine dynamometers for maximum performance. The Performer RPM cams have more lift and duration than most street camshafts. It is designed for increased horsepower and street high performance applications. They offer improved throttle response and torque. The intake valve lift with factory rocker arm ratio is 0. 560 and the exhaust valve lift is 0. 573. The intake duration at 0. 050 inch lift is 240 and the exhaust duration is 246. The style of the cam and lifter kit is hydraulic flat tappet and the basic operating RPM range is 1, 500-6, 500. The retainers, locks, valve stem seals, timing chain and gears, pushrods, rocker arms and gaskets are not included. Each kit includes a camshaft, hydraulic lifters, assembly lube, and instructions.