These hydraulic lifter cams are capable of 6000-plus rpm with stock springs and no valve float. A 6000+ rpm cam for stock heads and springs with hydraulic lifters. Bolt-in cam for light bikes (FXRS, etc.) adds significant mid-range power without affecting idle. Must check coil bind, valve-to-valve clearance and valve-to-piston clearance.. Made in the U.S.A..
