COMP Cams CL12-556-4 Nitrous HP 218/230 Hydraulic Flat Cam and Lifter Kit for Chevrolet Small Block High performance street. With 100-150 hp nitrous kit or small blower. 1,600-5,900 RPM Operating Range 218/230 Duration at .050". 113 Degree Lobe Separation Angle. 0.462"/0.480" Valve Lift CL Kits include a camshaft, a set of lifters, instructions and assembly lubricant. Wider lobe separation and added exhaust duration from base XE series help shift the power to higher RPM to allow use in nitrous applications. Early exhaust opening helps scavenge the extra spent gasses from nitrous or forced induction. Better time slips for nitrous passes at the strip. Fits Chevrolet GEN 1 Small Blocks including the 262, 265, 267, 283, 302, 305, 307, 327, 350 and 400. Does not fit LT1/LT4, or factory roller Small Blocks built from 1985 and newer. Made in USA