Description
Mishimoto
A failing thermostat can lead to elevated engine temperatures and potential internal engine damage. Improve the reliability and temperature control of your Cummins cooling system with the Mishimoto Low-Temperature Thermostat for 5.9L and 6.7L Cummins engines.
Designed as a direct-fit replacement for the factory thermostat, this Mishimoto unit features a lower activation temperature of 180°F, compared to the factory thermostat’s 190°F (1998.5–2010 & 2013) and 200°F (2010–2012) activation points. By opening earlier, coolant begins circulating through the engine sooner, helping reduce peak temperatures and maintain more consistent cooling.
This low-temperature thermostat is an excellent upgrade for trucks operated in warmer climates, under heavy towing, or during demanding driving conditions where additional thermal control is critical. Like all Mishimoto performance cooling products, it is backed by the Mishimoto Lifetime Warranty, ensuring long-term reliability and quality craftsmanship.
Features
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Direct-fit replacement for 1998.5–2013 Dodge Ram 5.9L & 6.7L Cummins
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Lower 180°F activation temperature for earlier coolant flow
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Helps reduce and stabilize engine operating temperatures
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Ideal for warm climates, towing, and high-load driving conditions
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Backed by the Mishimoto Lifetime Warranty
SKU: MMTS-RAM-99L
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