For 99-06 Big Twin (except 06 Dyna Glide). CNC-machined billet aluminum design features over twice the friction area of the stock clutch. Provide positive engagement and release .Incorporate six heavy-duty coil springs instead of the diaphragm spring; include an extra heavy-duty set of springs for higher horsepower applications. Friction plates are compatible with most primary oil. Simple bolt-on installation; requires the original clutch shell; no machining is necessary. Kits include clutch hub, drive plates, driven plates, (two) sets of clutch springs, pressure plate and necessary hardware. Sets of replacement fiber and steel clutch plates available separately. Optional clutch lock plates are specifically designed to be used to lock outer clutch basket to inner hub for removal and installation. Made in the U.S.A. - Part Number - DS223720
