Tuff Stuff - 1971-1986 (10SI) GM Alternators

The 10SI GM style alternators have a custom voltage regulator that lets the alternator be used as a 1-wire alternator or can be factory wired using the OEM plug. Available in a variety of finishes, these alternators output 100 or 140 amps. Every Tuff Stuff alternator is hand built and load tested in Cleveland, Ohio.