Chucking the old school coil springs and studs, this clutch utilizes state-of-the-art diaphragm spring technology to drastically improve clutch engagement and virtually eradicate clutch wrist fatigue. Gone are the days of clutch slippage, creeping and hard to get into neutral frustration! Fits 1998-2006 Evo & Twin Cam Big Twins (except 2006 Dyna Models). Made in the USA.