These hydraulic lifter cams are capable of 6000-plus rpm with stock springs and no valve float. Bolt-in street cam with fast open and close ramps. Uses stock springs; works with carbs or fuel injection. Pulls from 1500 to 6000 rpm. Similar timing to EV3, but designed to produce a very broad torque band. Must check coil bind, valve-to-valve clearance and valve-to-piston clearance.. Made in the U.S.A..