An alternator/shroud cover is used in conjunction with a Transmission Bearing Support. When the inner primary is discarded in favor of an open belt kit you need something to fill in the void around the left side motor/case. This alternator shroud from American Prime Mfg. is the perfect answer. It will make your ride whole again as well as providing you with a place to mount an outer belt guard if desired. Polished finish. Fits 1970-2006 Harley-Davidson Big Twins (except 2006 Dyna). Made in the USA.