Mishimoto MMTS-RAM-89H for Select Dodge D250, Dodge D350, Dodge W250, Dodge W350
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The 12-valve first-gen Cummins in your Ram is considered one of the best diesel engines ever produced, and for good reason. Fuel efficiency, torque, and simplicity are just a few characteristics that give the Cummins its stellar reputation. We're huge fans of the Cummins engine, which is why we’ve developed a high-temperature thermostat for the 1989-1993 5.9L 12v Cummins. This Mishimoto thermostat activates at a higher temperature (189.5°F) compared to the factory thermostat (180°F). By raising the activation temperature, coolant flows through the system later, promoting quicker engine warmup. The Mishimoto high-temperature thermostat is ideal for vehicles in cold climates, where rapid warmup and quicker in-cabin heat is vital. This thermostat includes a high-quality replacement gasket and our signature Mishimoto Lifetime Warranty.
Thermostat, High-Temp, fits Dodge 5.9L First-Gen Cummins 1989-1993
Fits: 1989-1993 Dodge D250, 1989-1993 Dodge D350, 1989-1993 Dodge W250, 1989-1993 Dodge W350
Please review Specifications and the detailed fitment table for notes and exceptions.