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Thumbnail Filmstrip of 1998.5-2013 5.9L / 6.7L Cummins High Temperature Thermostat Mishimoto MMTS-RAM-99H Images
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 Cummins performance thermostat is designed as a direct-fit replacement for your aged factory unit. The Mishimoto thermostat has a lower activation temperature (180°F) compared to the factory thermostat (190°F for 99–10 and 2013 trucks & 200°F for 10–12 trucks).The lower activation temperature allows coolant to flow through the engine earlier, which reduces and maintains lower engine temperatures. This Cummins performance thermostat is ideal for use in warmer climates or under extreme towing/driving conditions. As with all our Cummins performance parts, this thermostat includes the Mishimoto Lifetime Warranty, ensuring superior product quality and craftsmanship.
Features:
Direct fit for 1999–2013 Dodge Ram with 5.9L/6.7L Cummins
Activates at a lower temperature so coolant flows through the system earlier
Allows for cooler engine temperatures
Ideal for warm climates
Mishimoto Lifetime Warranty
Includes:
(1) Mishimoto Thermostat
(1) O-ring
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 Cummins performance thermostat is designed as a direct-fit replacement for your aged factory unit. The Mishimoto thermostat has a lower activation temperature (180°F) compared to the factory thermostat (190°F for 99–10 and 2013 trucks & 200°F for 10–12 trucks).The lower activation temperature allows coolant to flow through the engine earlier, which reduces and maintains lower engine temperatures. This Cummins performance thermostat is ideal for use in warmer climates or under extreme towing/driving conditions. As with all our Cummins performance parts, this thermostat includes the Mishimoto Lifetime Warranty, ensuring superior product quality and craftsmanship.
Features:
Direct fit for 1999–2013 Dodge Ram with 5.9L/6.7L Cummins
Activates at a lower temperature so coolant flows through the system earlier
Allows for cooler engine temperatures
Ideal for warm climates
Mishimoto Lifetime Warranty
Includes:
(1) Mishimoto [...]
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 Cummins performance thermostat is designed as a direct-fit replacement for your aged factory unit. The Mishimoto thermostat has a lower activation temperature (180°F) compared to the factory thermostat (190°F for 99–10 and 2013 trucks & 200°F for 10–12 trucks).The lower activation temperature allows coolant to flow through the engine earlier, which reduces and maintains lower engine temperatures. This Cummins performance thermostat is ideal for use in warmer climates or under extreme towing/driving conditions. As with all our Cummins performance parts, this thermostat includes the Mishimoto Lifetime Warranty, ensuring superior product quality and craftsmanship.
Features:
Direct fit for 1999–2013 Dodge Ram with 5.9L/6.7L Cummins
Activates at a lower temperature so coolant flows through the system earlier
Allows for cooler engine temperatures
Ideal for warm climates
Mishimoto Lifetime Warranty
Includes:
(1) Mishimoto Thermostat
(1) O-ring
Fits: 5.9 Cummins 1994-2002
Fits: 5.9 Cummins 1994-2002
Fits: 5.9 Cummins 1998.5-2007
Fits: 5.9 Cummins 1998.5-2007 | 3.9 Cummins 4BT
Fits: 5.9/6.7 Cummins 1998.5-2025
Fits: 5.9|6.7 Cummins 1998.5-2025