SKU: MMTS-RAM-99H | UPC: 748354013139
Mishimoto Dodge 5.9L/6.7L Cummins High-Temperature Thermostat
The Mishimoto High-Temperature Thermostat upgrades Dodge Ram trucks equipped with 5.9L and 6.7L Cummins diesel engines from 1999 to 2013, including 1500, 2500, 3500, 4500, and 5500 models across Laramie, SLT, ST, and more submodels. It opens at 221°F compared to stock 195°F for quicker warm-up, sustained higher coolant temperatures, reduced wet stacking, and improved turbocharger performance. This direct-fit part delivers reliable cooling control for daily driving or heavy towing.
Key Features
- 221°F Opening Temperature: Keeps coolant hotter longer to boost fuel efficiency, enhance turbo spool-up, and minimize emissions in modified Cummins engines
- CNC-Machined Billet Aluminum Housing: Provides superior strength, heat resistance, and precise fit versus cast OEM housings
- Direct OEM Replacement Design: Bolts in place of factory thermostat with no modifications for straightforward servicing
- Included Gaskets and O-Rings: Ensures a secure, leak-proof seal right out of the box for dependable operation
- Black Anodized Finish: Resists corrosion and wear while dissipating heat effectively under high-load conditions
Product Notes
- Consult application guide for exact vehicle compatibility before purchase
- Pair with high-performance coolant for maximum temperature stability
- Product weight 0.8 lbs. ships in 3 x 5 x 6 inch box
Installation Notes
- Professional installation recommended.
- Drain cooling system completely and flush before install to prevent contamination
- Use OEM torque specs on housing bolts. includes all necessary seals
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 |
| 2007-2010 | Dodge | Ram 2500 | Laramie |
| 2007-2010 | Dodge | Ram 2500 | SLT |
| 2007-2010 | Dodge | Ram 2500 | ST |
| 2008-2010 | Dodge | Ram 2500 | SXT |
| 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?
- Lifetime warranty protects your investment for years of use
- Engineered and dyno-tested for real-world Cummins durability
- Direct-fit precision from USA-based design team
Frequently Asked Questions
- Q: Will this thermostat fit my 2007-2010 Dodge Ram 2500 6.7L Cummins Laramie?
A: Yes, it is direct-fit for all listed 2007-2010 Dodge Ram 2500 submodels with 6.7L Cummins including Laramie, SLT, ST, and SXT - Q: What material is used for the thermostat housing?
A: High-strength billet aluminum CNC machined and finished with black anodizing for corrosion resistance and heat management - Q: How long is the Mishimoto warranty on this part?
A: Covered by Mishimoto Lifetime Warranty against defects in materials and workmanship when installed and used properly
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock – ships same or next business day
- Packaging: Protective Mishimoto box measuring 3 x 5 x 6 inches
- Weight: 0.8 lbs
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