Mishimoto Dodge 5.9L/6.7L Cummins Low-Temperature Thermostat - MMTS-RAM-99LFind parts that fit my vehicle

Mishimoto Dodge 5.9L/6.7L Cummins Low-Temperature Thermostat - MMTS-RAM-99L

• Direct-fit replacement for factory unit
• Lower activation temperature (180°F)
• Reduces and maintains lower engine temperatures
• Ideal for warmer climates and extreme towing/driving conditions
• Includes Mishimoto Lifetime Warranty

A defective thermostat can result in engine overheating and potential internal damage. Improve the reliability of your 5.9L/6.7L cooling system with a Mishimoto Dodge 5.9L/6.7L Cummins Low-Temperature Thermostat! This thermostat is designed as a direct-fit replacement for your aged factory unit. The Mishimoto thermostat has a lower activation temperature (180 degrees Fahrenheit) compared to the factory thermostat (190 degrees Fahrenheit for 99-10 and 2013 trucks & 200 degrees Fahrenheit for 10-12 trucks). The lower activation temperature allows coolant to flow through the engine earlier, which reduces and maintains lower engine temperatures. This thermostat is ideal for use in warmer climates or under extreme towing/driving conditions. As with all our products, this thermostat includes the Mishimoto Lifetime Warranty, ensuring superior product quality and craftsmanship.

Vehicle Fitment

This part fits:

• 1999-2001 Dodge Ram 1500 Laramie 5.9 Liter 42RE
• 2003 Dodge Ram 1500 Laramie 5.9 Liter 45RFE
• 1999-2001 Dodge Ram 1500 Laramie 5.9 Liter 46RE
• 2003 Dodge Ram 1500 Laramie 5.9 Liter 46RE
• 1999-2001 Dodge Ram 1500 Laramie 5.9 Liter NV3500
• 2003 Dodge Ram 1500 Laramie 5.9 Liter NV3500
• 1999-2001 Dodge Ram 1500 Laramie 5.9 Liter NV4500
• 2003 Dodge Ram 1500 Laramie 5.9 Liter NV4500
• 2002-2003 Dodge Ram 1500 SLT 5.9 Liter 45RFE
• 2002-2003 Dodge Ram 1500 SLT 5.9 Liter 46RE
• 2002-2003 Dodge Ram 1500 SLT 5.9 Liter NV3500
• 2002-2003 Dodge Ram 1500 SLT 5.9 Liter NV4500
• 1999-2001 Dodge Ram 1500 Sport 5.9 Liter 42RE
• 1999-2001 Dodge Ram 1500 Sport 5.9 Liter 46RE
• 1999-2001 Dodge Ram 1500 Sport 5.9 Liter NV3500
• 1999-2001 Dodge Ram 1500 Sport 5.9 Liter NV4500
• 1999-2001 Dodge Ram 2500 Base
• 2000-2001 Dodge Ram 2500 Base
• 2002-2003 Dodge Ram 2500 Base
• 2003 Dodge Ram 2500 ST
• 1999-2001 Dodge Ram 3500 Base
• 2000-2001 Dodge Ram 3500 Base
• 2002-2003 Dodge Ram 3500 Base
• 2004 Dodge Ram 2500 ST
• 2004 Dodge Ram 3500 ST
• 2004 Dodge Ram 2500 SLT
• 2004 Dodge Ram 3500 SLT
• 2005 Dodge Ram 3500 ST
• 2005 Dodge Ram 3500 SLT
• 2005 Dodge Ram 2500 ST
• 2005 Dodge Ram 2500 SLT
• 2005 Dodge Ram 2500 Laramie
• 2005 Dodge Ram 3500 Laramie
• 2006 Dodge Ram 2500 Laramie
• 2006 Dodge Ram 2500 SLT
• 2006 Dodge Ram 3500 Laramie
• 2006 Dodge Ram 3500 SLT
• 2006 Dodge Ram 2500 Power Wagon
• 2006 Dodge Ram 2500 Sport
• 2006 Dodge Ram 2500 ST
• 2006 Dodge Ram 2500 TRX4
• 2006 Dodge Ram 3500 ST
• 2006 Dodge Ram 3500 Sport
• 2007 Dodge Ram 2500 Laramie
• 2007 Dodge Ram 2500 SLT
• 2007 Dodge Ram 2500 Sport
• 2007 Dodge Ram 2500 ST
• 2007 Dodge Ram 2500 TRX4
• 2007 Dodge Ram 3500 Laramie
• 2007 Dodge Ram 3500 SLT
• 2007 Dodge Ram 3500 ST
• 2007 Dodge Ram 2500 Power Wagon
• 2008 Dodge Ram 2500 Power Wagon
• 2008 Dodge Ram 2500 Laramie
• 2008 Dodge Ram 2

Cooling products are essential components to keeping your vehicle running at optimal temperatures. Whether you are looking for a radiator, fans, or oil coolers, we've got you covered with the top brands like Mishimoto, Koyorad, Skunk2, Moroso, and more!

Mishimoto, the world leader in performance cooling products, was created for automotive enthusiasts by automotive enthusiasts. Established in 2005, we have more than a decade of experience in working toward our goal of providing superior cooling system upgrades for sport compact, modern muscle, European performance, classics, Jeeps, and trucks.

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