Xtreme 4X4 218/226 Hydraulic Flat Cam for AMC 199-258/4.0L Good mid to upper torque, needs increased compression, headers and gears. 1,400-5,700 RPM Operating Range 218/226 Duration at .050". 111 Degree Lobe Separation Angle 0.493"/0.512" Valve Lift Designed for use with common restrictive factory exhaust systems, including OEM exhaust manifolds. Improved throttle response and increased low and mid-range RPM horsepower for towing and off-road. Fits '64-'98 AMC 199-258/4.0L Made in USA