Ultra Series GM 10SI Alternator

100 AMP - Chrome - 1 Wire

Upgrade your charging system with the March Performance Ultra Series GM 10SI Alternator, delivering 100 amps of reliable power in a brilliant chrome finish. Designed with 6 and 12 o’clock mounting positions (6.6” center-to-center) and an easy one-wire hookup, this alternator ensures strong, consistent output with ultra-low cut-in voltage regulators for dependable charging even at idle. Built with neoprene-sealed bearings and high-efficiency copper and steel internals, it provides long-lasting durability, smooth operation, and show-quality appeal. Backed by the March Performance Lifetime Warranty.