Ultra Series GM 10SI Alternator

100 AMP - Black - 1 Wire

Deliver reliable charging performance with the March Performance Ultra Series GM 10SI Alternator, designed for strength, efficiency, and style. This 100-amp, one-wire alternator features 6 and 12 o’clock mounting positions (6.6” center-to-center) and ultra-low cut-in voltage regulators for consistent output even at low idle. Built with neoprene-sealed bearings and high-efficiency copper and steel internals, it ensures long-lasting durability and smooth operation. Finished in a sleek black coating, it adds a modern touch to any build. Backed by the March Performance Lifetime Warranty.