EV23 CamThese hydraulic lifter cams are capable of 6000 plus rpm with stock springs and no valve float. Bolt in cam for heavier touring bikes and high geared bikes with 65 tooth rear pulleys. Uses stock springs; works with carbs or fuel injection. Crisp throttle response and strong pulling power from 1500 to 6000 rpm. Works well in higher altitudes. Must check coil bind, valve to valve clearance and valve to piston clearance.. Made in the U. S. A..