Mishimoto Dodge 5.9L/6.7L Cummins Low-Temperature Thermostat

SKU: MMTS-RAM-99L | UPC: 748354013146

Mishimoto Dodge 5.9L/6.7L Cummins Low-Temperature Thermostat

Replace your stock thermostat with the Mishimoto low-temperature thermostat designed for Dodge Ram trucks equipped with 5.9L or 6.7L Cummins diesel engines. This direct-fit upgrade fits 1999-2013 Ram 1500, 2500, 3500, 4500, and 5500 models across various submodels. It opens at 160°F to deliver lower operating coolant temperatures, supporting higher performance during towing, racing, or daily driving while enabling faster warmup times.

Key Features

• Lower Opening Temperature: Activates at 160°F and fully opens at 180°F versus stock 180-203°F range, reducing engine temps by 15-25°F under load for consistent power output
• Direct OEM Replacement: Exact fit with no modifications required, includes O-ring seal for leak-free installation on 5.9L 24-valve and 6.7L Cummins engines
• Enhanced Cooling Performance: Maintains optimal coolant flow to radiator and intercooler, preventing heat soak in upgraded turbo or tuning applications
• Durable Construction: High-quality wax pellet, stainless steel spring, and precision-machined components withstand high-pressure diesel environments
• Quick Warmup: Faster engine warmup in cold conditions improves fuel efficiency and reduces emissions during startup

Product Notes

• Pair with upgraded radiator or fan for maximum cooling gains in high-horsepower builds
• Monitor coolant levels after install to ensure proper function
• Product weight 0.4 lbs, ships in compact box measuring 3in x 5in x 7in

Installation Notes

• Professional installation recommended.
• Drain coolant before removing stock thermostat housing
• Compatible with factory housing and bolts, torque to OEM specs

This Part Fits

Year	Make	Model	Submodel
1999-2001,2003	Dodge	Ram 1500	Laramie
2002-2003	Dodge	Ram 1500	SLT
1999-2001	Dodge	Ram 1500	Sport
1999-2003	Dodge	Ram 1500	ST
1999-2002	Dodge	Ram 2500	Base
2003,2005-2010	Dodge	Ram 2500	Laramie
2006-2010	Dodge	Ram 2500	Power Wagon
2003-2010	Dodge	Ram 2500	SLT
2006-2007	Dodge	Ram 2500	Sport
2003-2010	Dodge	Ram 2500	ST
2008-2010	Dodge	Ram 2500	SXT
2010	Dodge	Ram 2500	TRX
2006-2007	Dodge	Ram 2500	TRX4
1999-2002	Dodge	Ram 3500	Base
2003-2010	Dodge	Ram 3500	Laramie
2003-2010	Dodge	Ram 3500	SLT
2006-2007	Dodge	Ram 3500	Sport
2003-2010	Dodge	Ram 3500	ST
2008-2010	Dodge	Ram 3500	SXT
2007	Dodge	Ram 3500	TRX4
2008-2010	Dodge	Ram 4500	Laramie
2008-2010	Dodge	Ram 4500	SLT
2008-2010	Dodge	Ram 4500	ST
2008-2010	Dodge	Ram 5500	Laramie
2008-2010	Dodge	Ram 5500	SLT
2008-2010	Dodge	Ram 5500	ST
2013	Ram	2500	Big Horn
2011-2013	Ram	2500	Laramie
2011-2013	Ram	2500	Laramie Longhorn
2013	Ram	2500	Lone Star
2012-2013	Ram	2500	Outdoorsman
2011-2013	Ram	2500	Power Wagon
2011-2013	Ram	2500	SLT
2011-2013	Ram	2500	ST
2013	Ram	2500	Tradesman

Why Choose Mishimoto?

• Proven track record in diesel cooling upgrades for Cummins engines
• Rigorously tested on dyno and track for reliability under extreme conditions
• Lifetime warranty covers defects in materials and workmanship

Frequently Asked Questions

• Q: Will this fit my 2005 Dodge Ram 2500 5.9L Cummins?
  A: Yes, it provides direct compatibility for 1999-2010 Dodge Ram 2500/3500 with 5.9L Cummins across Laramie, SLT, ST, and other submodels listed
• Q: What material is the thermostat made from?
  A: Features a robust wax pellet actuator, stainless steel spring, and engineered brass plate for corrosion resistance and long-term durability in coolant
• Q: Does installation require special tools or tuning?
  A: No special tools needed beyond basic wrenches. direct bolt-on swap with included O-ring, no ECU changes or tuning required

Shipping & Handling

• Method: UPS Ground
• Availability: In stock – ships same or next business day
• Packaging: Secure Mishimoto retail box, 3in x 5in x 7in
• Weight: 0.4 lbs