For a cleaner look with better clutch function, heat dissipation and dependability TTP can be run wet with the splined Shovel clutch Splined Shovel clutch is highly recommended for 93+" engines to avoid trouble down the road Hardware includes motor sprocket nut, chain adjuster, slotted housing screws, NPT fittings and housing gasket Media blasted finish Kickstart only Derby and inspection covers, 352-900, sold seperately