The Edelbrock Performer-Plus Camshaft and Lifter Kits feature smooth idling cams for daily drivers, trucks, vans, RVs, and 4x4s. They offer improved throttle response and torque. Each kit includes a camshaft, hydraulic lifters, assembly lube and instructions. The valve springs, retainers, locks, pushrods, rocker arms and gaskets are not included. Both the lifter and the cam come with hydraulic flat tappet style. The advertised intake duration is 204 degrees and the advertised exhaust duration is 214 degrees. The intake valve lift with factory rocker arm ratio is 0. 448 and the exhaust valve lift factory rocker is 0. 472. The lobe separation is 114 degrees.