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HomeShopThermostatsMishimoto Dodge 5.9L/6.7L Cummins Low-Temperature Thermostat Part MMTS-RAM-99L
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Mishimoto Dodge 5.9L/6.7L Cummins Low-Temperature Thermostat Part MMTS-RAM-99L
Mishimoto Dodge 5.9L/6.7L Cummins Low-Temperature Thermostat Part MMTS-RAM-99L - Image 2
Mishimoto Dodge 5.9L/6.7L Cummins Low-Temperature Thermostat Part MMTS-RAM-99L - Image 3
Mishimoto Dodge 5.9L/6.7L Cummins Low-Temperature Thermostat Part MMTS-RAM-99L - Image 4
Mishimoto Dodge 5.9L/6.7L Cummins Low-Temperature Thermostat Part MMTS-RAM-99L - Image 5
Mishimoto Dodge 5.9L/6.7L Cummins Low-Temperature Thermostat Part MMTS-RAM-99L - Image 6
Mishimoto Dodge 5.9L/6.7L Cummins Low-Temperature Thermostat Part MMTS-RAM-99L - Image 7
Mishimoto Dodge 5.9L/6.7L Cummins Low-Temperature Thermostat Part MMTS-RAM-99L - Image 8
Mishimoto Dodge 5.9L/6.7L Cummins Low-Temperature Thermostat Part MMTS-RAM-99L - Image 9
Mishimoto Dodge 5.9L/6.7L Cummins Low-Temperature Thermostat Part MMTS-RAM-99L - Image 10

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

SKU: MMTS-RAM-99L

Original price was: $92.00.Current price is: $83.95.

In stock

11 in stock

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. Low-Temperature Thermostat, fits Dodge 5.9L/6.7L Cummins 1999-2013 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 1500 ST 5.9 Liter 42RE, 2002-2003 Dodge Ram 1500 ST 5.9 Liter 45RFE, 1999-2003 Dodge Ram 1500 ST 5.9 Liter 46RE, 1999-2003 Dodge Ram 1500 ST 5.9 Liter NV3500, 1999-2003 Dodge Ram 1500 ST 5.9 Liter NV4500, 2003 Dodge Ram 2500 5.9 Liter 45RFE, 1999-2003 Dodge Ram 2500 5.9 Liter 46RE, 1999-2003 Dodge Ram 2500 5.9 Liter 47RE, 2003-2009 Dodge Ram 2500 5.9 Liter 48RE, 1999-2005 Dodge Ram 2500 5.9 Liter NV4500, 1999-2004 Dodge Ram 2500 5.9 Liter NV4500HD, 1999-2005 Dodge Ram 2500 5.9 Liter NV5600, 1999-2002 Dodge Ram 2500 Base 5.9 Liter 46RE, 1999-2002 Dodge Ram 2500 Base 5.9 Liter 46RE, 1999-2002 Dodge Ram 2500 Base 5.9 Liter 47RE, 1999-2002 Dodge Ram 2500 Base 5.9 Liter 47RE, 1999-2002 Dodge Ram 2500 Base 5.9 Liter NV4500, 1999-2002 Dodge Ram 2500 Base 5.9 Liter NV4500, 1999-2002 Dodge Ram 2500 Base 5.9 Liter NV4500HD, 1999-2002 Dodge Ram 2500 Base 5.9 Liter NV4500HD, 1999-2002 Dodge Ram 2500 Base 5.9 Liter NV5600, 1999-2002 Dodge Ram 2500 Base 5.9 Liter NV5600, 2005-2007 Dodge Ram 2500 Laramie 5.9 Liter 48RE, 2005-2007 Dodge Ram 2500 Laramie 5.9 Liter 545RFE, 2007 Dodge Ram 2500 Laramie 5.9 Liter 68RFE, 2005-2007 Dodge Ram 2500 Laramie 5.9 Liter G56 ...See Application Guide for Additional Fitments
  • Activates at lower temperature so coolant flows through system earlier
  • Allows for cooler engine temperatures
  • Ideal for warm climates
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Description

Upgrade your Dodge Cummins engine’s cooling system with the Mishimoto Low-Temperature Thermostat, designed specifically for 5.9L and 6.7L engines from 1999 to 2013. This direct-fit replacement helps prevent engine overheating by activating at a lower temperature of 180°F, compared to the factory setting of 190°F or higher. The earlier coolant flow ensures your engine stays cooler under extreme conditions, particularly in warmer climates or during heavy towing and driving. Crafted with precision and built for durability, this thermostat offers reliable performance to protect your engine from potential internal damage caused by overheating. As part of Mishimoto’s commitment to quality, it comes with a lifetime warranty, providing peace of mind alongside enhanced cooling performance.

Features:

  • Activates at 180°F for earlier coolant flow, helping to maintain lower engine temperatures
  • Direct-fit replacement for factory thermostats on Dodge 5.9L and 6.7L Cummins engines
  • Designed for optimal performance in warm climates and under extreme towing conditions
  • Constructed with high-quality materials for durability and long-lasting performance
  • Includes Mishimoto Lifetime Warranty for assured quality and craftsmanship

Fitment:
Dodge Ram 2500 Base 1999
Dodge Ram 2500 Base 2000
Dodge Ram 2500 Base 2001
Dodge Ram 2500 Base 2002
Dodge Ram 2500 Laramie 2003
Dodge Ram 2500 Laramie 2005
Dodge Ram 2500 Laramie 2006
Dodge Ram 2500 Laramie 2007
Dodge Ram 2500 Laramie 2008
Dodge Ram 2500 Laramie 2009
Dodge Ram 2500 Laramie 2010
Dodge Ram 2500 Power Wagon 2006
Dodge Ram 2500 Power Wagon 2007
Dodge Ram 2500 Power Wagon 2008
Dodge Ram 2500 Power Wagon 2009
Dodge Ram 2500 Power Wagon 2010
Dodge Ram 2500 SLT 2003
Dodge Ram 2500 SLT 2004
Dodge Ram 2500 SLT 2005
Dodge Ram 2500 SLT 2006
Dodge Ram 2500 SLT 2007
Dodge Ram 2500 SLT 2008
Dodge Ram 2500 SLT 2009
Dodge Ram 2500 SLT 2010
Dodge Ram 2500 Sport 2006
Dodge Ram 2500 Sport 2007
Dodge Ram 2500 ST 2003
Dodge Ram 2500 ST 2004
Dodge Ram 2500 ST 2005
Dodge Ram 2500 ST 2006
Dodge Ram 2500 ST 2007
Dodge Ram 2500 ST 2008
Dodge Ram 2500 ST 2009
Dodge Ram 2500 ST 2010
Dodge Ram 2500 SXT 2008
Dodge Ram 2500 SXT 2009
Dodge Ram 2500 SXT 2010
Dodge Ram 2500 TRX 2010
Dodge Ram 2500 TRX4 2006
Dodge Ram 2500 TRX4 2007
Dodge Ram 3500 Base 1999
Dodge Ram 3500 Base 2000
Dodge Ram 3500 Base 2001
Dodge Ram 3500 Base 2002
Dodge Ram 3500 Laramie 2003
Dodge Ram 3500 Laramie 2004
Dodge Ram 3500 Laramie 2005
Dodge Ram 3500 Laramie 2006
Dodge Ram 3500 Laramie 2007
Dodge Ram 3500 Laramie 2008
Dodge Ram 3500 Laramie 2009
Dodge Ram 3500 Laramie 2010
Dodge Ram 3500 SLT 2003
Dodge Ram 3500 SLT 2004
Dodge Ram 3500 SLT 2005
Dodge Ram 3500 SLT 2006
Dodge Ram 3500 SLT 2007
Dodge Ram 3500 SLT 2008
Dodge Ram 3500 SLT 2009
Dodge Ram 3500 SLT 2010
Dodge Ram 3500 Sport 2006
Dodge Ram 3500 Sport 2007
Dodge Ram 3500 ST 2003
Dodge Ram 3500 ST 2004
Dodge Ram 3500 ST 2005
Dodge Ram 3500 ST 2006
Dodge Ram 3500 ST 2007
Dodge Ram 3500 ST 2008
Dodge Ram 3500 ST 2009
Dodge Ram 3500 ST 2010
Dodge Ram 3500 SXT 2008
Dodge Ram 3500 SXT 2009
Dodge Ram 3500 TRX4 2007
Ram 2500 Big Horn 2013
Ram 2500 Laramie 2011
Ram 2500 Laramie 2012
Ram 2500 Laramie 2013
Ram 2500 Laramie Longhorn 2011
Ram 2500 Laramie Longhorn 2012
Ram 2500 Laramie Longhorn 2013
Ram 2500 Lone Star 2013
Ram 2500 Outdoorsman 2012
Ram 2500 Outdoorsman 2013
Ram 2500 Power Wagon 2011
Ram 2500 Power Wagon 2012
Ram 2500 Power Wagon 2013
Ram 2500 SLT 2011
Ram 2500 SLT 2012
Ram 2500 SLT 2013
Ram 2500 ST 2011
Ram 2500 ST 2012
Ram 2500 ST 2013
Ram 2500 Tradesman 2013

Additional information

Weight 0.25 lbs
Dimensions 3 × 2.8 × 2.6 in
air_freight_prohibited

false
not_carb_approved

false
ltl_freight_required

false
prop_65

Y
part_type

automotive
epa

N/A
carb_acknowledgement_required

false
regular_stock

t
upc

748354013146
brand

Mishimoto
part_number

MMTS-RAM-99L

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