594 CAMS - Fierce performing camshaft for an array of engines sizes, large displacement 103"", 110"" & 124"" engines looking for a superior torque band with excellent horsepower gains in heavy bikes (RPM 2,200 - 6,250.) Smaller high revving displacement 95" style engines in lighter bikes looking to twist the throttle and tap into some horsepower (RPM 2,500 - 6,800). Large displacements respond well to increased compression ratio and smaller displacements will require it. 594 cams require high performance valve springs, pushrods, lifters, carburetor and or throttle body work, performance exhaust, intake and clutch. Update your old mechanical style cams and tensioners to the new hydraulic style tensioner system Conversion camshafts for '99-'06 Twin Cam engines utilize the 1999-2006 inner cam journals with the 2007-16 outer cam journals allowing the use of the 2007-16 camplates, oil pump, hydraulic chain tensioners and chain drive system. Conversion camshafts do not fit in a conversion camplate, conversion camshafts use the 2007-16 camplate/oil pump