320 Amp High Output Alternator - 1989-2002 Dodge Ram 5.9L Cummins 12V & 24V

320 Amp High Output Alternator for 1989-2002 Dodge Ram 5.9L Cummins 12V & 24V

Fits the 5.9L Cummins in 1989-2002 Dodge full-size trucks, covering both the 12-valve 6BT and the 24-valve ISB. This is a direct bolt-in upgrade over the factory unit — same mount, same pulley position, no bracket modification.

Diesel engines spend most of their working life at low RPM, and that is exactly where a stock alternator runs out of headroom. This unit holds 200+ amps at engine idle and delivers a full 320+ amps at cruising speed, hot rated — enough for a lift pump, auxiliary lighting, a winch, a plow, a welder or a competition-grade stereo without watching your voltage sag at every stoplight.

Engine codes covered: 12-valve 6BT, 24-valve ISB

Vehicles: Dodge Ram 2500 3500

Manufacturer specifications and full fitment

The S series of 6 phase alternators offers incredible output in a compact and durable package. Highly efficient, these units use less horsepower per Kw of power produced than conventional 3 phase alternators. 12 diodes, twin rectifier plates and outstanding airflow ensure long service life, even in severe conditions.

Installation Notes:

Fitment Guide: