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Vehicle Info NeededMISHIMOTOPART NUMBER: 690-MMTS-RAM-89L
MMTS-RAM-89L Thermostat Low-Temp Dodge 5.9L First-Gen Cummins 1989-1993
$6495
Ships on 09/17/2026
Lowest Price GuaranteeThermostatLow-Temp Dodge 5.9L First-Gen Cummins 1989-1993
Mishimoto MMTS-RAM-89L Features:
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 low-temperature thermostat for the 1989-1993 5.9L 12v Cummins. This Mishimoto thermostat activates at a lower temperature (174.2°F) compared to the factory thermostat (180°F). By lowering the activation temperature, coolant flows through the radiator earlier, maintaining lower fl uid temperatures. The Mishimoto low-temperature thermostat is ideal for vehicles in warmer climates, or for use in vehicles experiencing extreme driving/towing conditions. This thermostat includes a high-quality replacement gasket and our signature Mishimoto Lifetime Warranty.- Lower activation temperature allows coolant to flow through the system earlier, maintaining lower coolant temperatures
- Ideal for vehicles in warm climates or under extreme driving/towing conditions
- Includes thermostat and high-quality replacement gasket
Part TypeThermostat
BrandMISHIMOTO
Package Height2.5
Package Width2.5
Package Length2.5
Weight0.09 PG
Part CategoryPerformance Parts
Part FitmentDirect Fit
Vendor Part NumberMMTS-RAM-89L
Package Qty1
Package TypeEA
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