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

240 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 240+ 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

S Series

The S series of 6 phase alternators offers incredible output in a compact and durable package. Highly efficient, these units use less horsepower than conventional 3 phase alternators. 12 diodes, twin rectifier plates and outstanding airflow ensure long service life, even in severe conditions. These units are available for a broad range of domestic and import applications in 170, 240, or 320 amp configurations. The 240 amp model offers the best balance between peak output, and output at engine idle RPM.

Installation Notes:

Fitment Guide: