Powermaster Signature Series Alternator (PM27296)POLISHED 100AMP ALTER 6 RIB GM Chev 12si, 100 amp, internal regulator, Serpentine pulley, Polished Part Number: PM27296 Available in 100 and 140 Amp, the new Smooth Look 12si alternator housings for early GM, have been optimised for superior polishing and chrome plating. Part of the excitingnew Signature Series line of alternators and starters, all sharp lines and edges have been blended. All Smooth Look units come with anexclusive nose cone that has