COMP Cams CL11-236-4 Xtreme Marine 226/236 Hydraulic Flat Cam and Lifter Kit for Chevrolet Big Block 396-454 Jet w/ A impeller, strong mid- range, good throttle response, noticeable idle. 1,600-5,800 RPM Operating Range 226/236 Duration at .050". 112 Degree Lobe Separation Angle. 0.544"/0.547" Valve Lift CL Kits include a camshaft, a set of lifters, instructions and assembly lubricant. Works against restrictive exhaust systems, while the extremely wide powerband helps get boats on plane and make maximum horsepower. Intended for applications where low idle speeds are required, while enhanced power production helps maintain top-end speed for longer distances. Fits Chevrolet 396-454 Mark IV Big Block Made in USA