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Mishimoto Low-Temperature Thermostat - MMTS-RAM-99L
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 and 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.

Purchase Includes:
  • (1) Mishimoto Thermostat
  • (1) O-ring
  • Mishimoto Lifetime Warranty


Features:
  • Activates at lower temperature so coolant flows through system earlier
  • Allows for cooler engine temperatures
  • Direct fit for 1999-2013 Dodge Ram with 5.9L/6.7L Cummins
  • Ideal for warm climates
  • Mishimoto Lifetime Warranty


Specifications:
  • Mishimoto Activation Temperature Degree F): 180
  • OEM Activation Temperature Degree F): 190


Fitment:
  • Dodge Ram 2500 Base 1999-2002
  • Dodge Ram 2500 Crew 2009
  • Dodge Ram 2500 Custom 1999-2002
  • Dodge Ram 2500 Laramie 2003-2010
  • Dodge Ram 2500 Power Wagon 2006-2010
  • Dodge Ram 2500 SLT 1999-2010
  • Dodge Ram 2500 SLT Big Horn 2008
  • Dodge Ram 2500 SLT Daytona 2005
  • Dodge Ram 2500 SLT Night Runner Sport 2006
  • Dodge Ram 2500 SLT Sport 2006-2008
  • Dodge Ram 2500 Sport 2006-2007
  • Dodge Ram 2500 ST 2003-2010
  • Dodge Ram 2500 SXT 2008-2010
  • Dodge Ram 2500 TRX 2010
  • Dodge Ram 2500 TRX4 2006-2007
  • Dodge Ram 3500 Base 1999-2002
  • Dodge Ram 3500 Custom 1999-2002
  • Dodge Ram 3500 Laramie 2003-2010
  • Dodge Ram 3500 SLT 1999-2010
  • Dodge Ram 3500 Sport 2006-2007
  • Dodge Ram 3500 ST 2003-2010
  • Dodge Ram 3500 SXT 2008-2010
  • Dodge Ram 3500 TRX4 2007
  • Dodge Ram 4500 Base 2008-2010
  • Dodge Ram 4500 Laramie 2008-2010
  • Dodge Ram 4500 SLT 2008-2010
  • Dodge Ram 4500 ST 2008-2010
  • Dodge Ram 5500 Base 2008-2010
  • Dodge Ram 5500 Laramie 2008-2010
  • Dodge Ram 5500 SLT 2008-2010
  • Dodge Ram 5500 ST 2008-2010
  • Ram 2500 Big Horn 2013
  • Ram 2500 Hemi Sport 2012-2013
  • Ram 2500 Laramie 2011-2013
  • Ram 2500 Laramie Longhorn 2011-2013
  • Ram 2500 Lone Star 2013
  • Ram 2500 Outdoorsman 2011-2013
  • Ram 2500 Power Wagon 2011-2013
  • Ram 2500 R/T 2012-2013
  • Ram 2500 SLT 2011-2013
  • Ram 2500 SLT Sport 2011
  • Ram 2500 ST 2011-2013
  • Ram 2500 SXT 2011-2013
  • Ram 2500 Tradesman 2013
  • Ram 4500 Laramie 2011-2013
  • Ram 4500 SLT 2011-2013
  • Ram 4500 ST 2011-2013
  • Ram 4500 Tradesman 2013
  • Ram 5500 Laramie 2011-2013
  • Ram 5500 SLT 2011-2013
  • Ram 5500 ST 2011-2013
  • Ram 5500 Tradesman 2013

Other Part Numbers:
Mishimoto #misMMTS-RAM-99L

Proposition 65

⚠ WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Mishimoto Banner

Who is Mishimoto?

Mishimoto is an aftermarket automotive company that was established in 2005. They are known for creating the industry’s best performing cooling system components. Today, they have become the market leader and has been chosen by various enthusiasts worldwide.

Parts for All Your Cooling Needs

Mishimoto offers a wide range of products such as couplings, radiators, fans, and other cooling system components for practically every vehicle, may it be a sport compact, truck, jeep, muscle cars, and classic vehicles. They also offer intake systems and intercoolers that help the vehicle gain more horsepower.

Built to Perform Better

The company creates products that are better than the stock components. Their parts are designed to work in higher pressure ratings and are more robust. Hence, they are the brand of choice by tuners and enthusiasts who demand a cooling system that can work for high-performance applications. Many racers choose Mishimoto as it has proven itself to produce race winners whatever racing discipline it is, may it be circuit racing, drag racing, drifting, and off road racing.

Purchase Mishimoto Products at Vivid Racing

Your vehicle cooling system plays a critical role in your vehicle. It keeps the temperature at bay and prevents severe damages caused by overheating. If you want a product that can put your trust in, then Mishimoto is the brand for you. Tested by many racers on the track and a variety of car enthusiasts on the street, you can be sure that you will never go wrong with Mishimoto.

Visit Vivid Racing and check out their list of products that would fit your specific needs.











Mishimoto Automotive ("Mishimoto") warrants its products under this lifetime limited warranty policy ("Warranty Policy"). This Warranty Policy applies solely to: (i) Mishimoto Products purchased directly from Mishimoto or Mishimoto authorized dealers (each a "Mishimoto Product" and collectively, the "Mishimoto Products") and (ii) the original purchaser of such Mishimoto Product ("Purchaser"). This Warranty Policy is non-transferable and all claims under this Warranty Policy must be accompanied by the original sales receipt. The terms and conditions of this Warranty Policy are subject to change by Mishimoto at any time without notice.

Pursuant to the terms and conditions of this Warranty Policy, after submission of a valid claim by a Purchaser and regardless of the condition of the product for which such valid claim is submitted, if it is determined by Mishimoto that such Mishimoto Product was not manufactured to Mishimoto's advertised specifications or if such claim was submitted pursuant to Mishimoto's Accident Protection Plan, as described herein, Mishimoto will, at its discretion: (i) repair or replace Purchaser's original Mishimoto Product; (ii) replace Purchaser's original Mishimoto Product with the most current available model (if, for example, the original model of the product for which a valid claim has been submitted is not available); or (iii) provide the purchaser with a gift card redeemable at Mishimoto.com in the amount of the original purchase price of the original Mishimoto Product (if, for example, Mishimoto has discontinued support for a Purchaser's specific application).

To submit a claim for a Mishimoto Product under this Warranty Policy, you must: (i) fully and accurately fill out the online form provided below; and (ii) provide Mishimoto with a copy of an original sales receipt indicating that you are the original Purchaser of the Mishimoto Product for which the claim is being submitted (you must also provide the information described in the paragraph of this Warranty Policy titled "Mishimoto Accident Protection Plan" if you are submitting a claim for a Mishimoto Product damaged in an accident). In addition, if requested by Mishimoto, you must also send the Mishimoto Product for which a claim is being made, all transportation expenses prepaid, to Mishimoto.
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Things
Sale price None
Wholesale price $79.25
Shipping Weight: 0.26
Length: 3
Width: 3
Height: 3
Product Added At Tuesday 14 July, 2020
Product Modified At Friday 11 July, 2025
Imported By ETLOverride
Last Edited By Turn_API
View In Admin

Emissions Info
Carb Approved Yes
Carb Number -
Epa Status N/A
Prop65 Unknown
Carb Required -
Vendors
Some placeholder content for the collapse component. This panel is hidden by default but revealed when the user activates the relevant trigger.
Vendor Inv Cost Retail Jobber MAP Core Updated
Turn 14 $67.16 $92.00 ? $83.95 ? 2025-07-11 10:34:09


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