Motion Raceworks 10-10042 - LS 3" OD Billet Overdrive Alternator Pulley 6 Rib

Factory alternators can be very dependable and easy to find, which is why most of the aftermarket industry builds front drive bracketry kits around these pieces. Designed to be used with LS style 6 rib LS Factory style alternators. Simply remove your factory alternator pulley with a puller and press on this