GM 10SI 320 AMP 1 Wire Polished Alternator

Write a Review


Update your GM vehicle with a modern, built-to-last alternator from March Performance.

  • High-quality, neoprene-sealed bearings mean this GM 10SI alternator is built to last.
  • Ultra low cut-in voltage regulators allow extra amps to flow in low idle scenarios.
  • The GM 10SI alternator features exclusively developed rotors and stators with a higher copper and steel content.

Does your alternator need a boost? This GM 10SI, 320-amp alternator was designed to completely enhance your GM vehicle performance. March Performance engineered this alternator with durability in mind — its billet aluminum finish and state-of-the-art rotors and stators mean it’ll last for ages.

Check out this alternator for GM and other vehicle-enhancing products today!

Product Details:

  • 6 and 12 mounting positions
  • 7-inch diameter
  • High 320 amp
  • One easy-to-connect wire

Alternator Includes:

  • Alternator Pulley
  • Pulley Cover
  • Alternator Fan


For All Inclusive Kit Replacement Alternators, Please Call *1-888-729-9070*

View AllClose