Powermaster Signature Series Alternator PM27296Powermaster Signature Series AlternatorChev 12si, 100 amp, internal regulator, Serpentine pulley, Polished PM27296 27296 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 exciting new Signature Series line of alternators and starters, all sharp lines and edges have been blended. All Smooth Look units come with an exclusive nose cone that