These hydraulic lifter cams are capable of 6000-plus rpm with stock springs and no valve float. Bolt-in cam for street or touring use with more mid-range and upper-end power than the stock 88 EV cams. Uses stock springs; works with carbs or fuel injection. Especially effective in reducing oil temperature. Must check coil bind, valve-to-valve clearance and valve-to-piston clearance.. Made in the U.S.A..