Powermaster 37294-360 GM 12si Alternator, 150A, 1V Belt, Brushed

Powermaster GM 12si style alternators feature excellent output at idle. 12si are one unit for 1 or 3 wire hookup. They fit most GM brackets from 1964-1989 and are a popular high output upgrade for 10DN & 10si alternators.
Powermaster 37294-360 GM 12si Original Look 1V pulley Baffle & cone 1-wire or 3-wire 100A at idle, 150A top end Brushed finish If using as OE 3-wire plug-in, you must have a dash light or resistor in line to avoid damage to the regulator