Overview Reviews Product Description 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 & 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. Mishimoto Dodge 5.9L/6.7L Cummins Low-Temperature Thermostat MMTS-RAM-99L 1999-2001 Dodge Ram 1500 Laramie 5.9 Liter 42RE, 1999-2001 Dodge Ram 1500 Laramie 5.9 Liter 42RE, 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 46RE, 2003 Dodge Ram 1500 Laramie 5.9 Liter 46RE, 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 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 NV3500, 2003 Dodge Ram 1500 Laramie 5.9 Liter NV3500, 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 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, 1999-2001 Dodge Ram 1500 Laramie 5.9 Liter NV4500, 2003 Dodge Ram 1500 Laramie 5.9 Liter NV4500, 1999-2001 Dodge Ram 1500 Laramie 5.9 Liter NV4500, 2003 Dodge Ram 1500 Laramie 5.9 Liter NV4500, 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 45RFE, 2002-2003 Dodge Ram 1500 SLT 5.9 Liter 46RE, 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 NV3500, 2002-2003 Dodge Ram 1500 SLT 5.9 Liter NV4500, 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 42RE, 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 46RE ...See Application Guide for Additional Fitments Product Videos Custom Field Product Reviews Write a Review Write a Review × Mishimoto Mishimoto Dodge 5.9L/6.7L Cummins Low-Temperature Thermostat Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *
Quick view Details Mishimoto | sku: MMTS-RAM-99H Mishimoto Dodge 5.9L/6.7L Cummins High-Temperature Thermostat MSRP: Now: $88.99 Add to Cart Quick view Details Mishimoto | sku: MMTS-RAM-94L Mishimoto Dodge 5.9L Cummins Low-Temperature Thermostat MSRP: Now: $88.99 Add to Cart Quick view Details Mishimoto | sku: MMTS-RAM-94H Mishimoto Dodge 5.9L Cummins High-Temperature Thermostat MSRP: Now: $70.95 Out of stock Quick view Details Mishimoto | sku: misMMTS-RAM-89L Mishimoto 89-93 Dodge 5.9L Cummins 79C High-Temperature Thermostat MSRP: Now: $68.99 Add to Cart Quick view Details Mishimoto | sku: misMMTS-RAM-89H Mishimoto 89-93 Dodge 5.9L Cummins 87.5C High-Temperature Thermostat MSRP: Now: $53.95 Out of stock Quick view Details Mishimoto | sku: MMINT-RAM-03SL Mishimoto 03-09 Dodge 5.9L/6.7L Cummins Intercooler (Silver) MSRP: Now: $1,356.99 Add to Cart Quick view Details Mishimoto | sku: MMINT-RAM-03BK Mishimoto 03-09 Dodge 5.9L/6.7L Cummins Intercooler (Black) MSRP: Now: $1,356.99 Add to Cart Quick view Details Mishimoto | sku: MMTC-RAM-03SL Mishimoto 03-09 Dodge Ram 5.9L/6.7L Cummins Transmission Cooler MSRP: Now: $602.99 Add to Cart ×
Quick view Details Mishimoto | sku: MMTS-RAM-94L Mishimoto Dodge 5.9L Cummins Low-Temperature Thermostat MSRP: Now: $88.99 Add to Cart Quick view Details Mishimoto | sku: MMTS-RAM-94H Mishimoto Dodge 5.9L Cummins High-Temperature Thermostat MSRP: Now: $70.95 Out of stock Quick view Details Mishimoto | sku: misMMTS-RAM-89L Mishimoto 89-93 Dodge 5.9L Cummins 79C High-Temperature Thermostat MSRP: Now: $68.99 Add to Cart Quick view Details Mishimoto | sku: misMMTS-RAM-89H Mishimoto 89-93 Dodge 5.9L Cummins 87.5C High-Temperature Thermostat MSRP: Now: $53.95 Out of stock Quick view Details Mishimoto | sku: MMINT-RAM-03SL Mishimoto 03-09 Dodge 5.9L/6.7L Cummins Intercooler (Silver) MSRP: Now: $1,356.99 Add to Cart Quick view Details Mishimoto | sku: MMINT-RAM-03BK Mishimoto 03-09 Dodge 5.9L/6.7L Cummins Intercooler (Black) MSRP: Now: $1,356.99 Add to Cart Quick view Details Mishimoto | sku: MMTC-RAM-03SL Mishimoto 03-09 Dodge Ram 5.9L/6.7L Cummins Transmission Cooler MSRP: Now: $602.99 Add to Cart ×
Quick view Details Mishimoto | sku: MMTS-RAM-94H Mishimoto Dodge 5.9L Cummins High-Temperature Thermostat MSRP: Now: $70.95 Out of stock Quick view Details Mishimoto | sku: misMMTS-RAM-89L Mishimoto 89-93 Dodge 5.9L Cummins 79C High-Temperature Thermostat MSRP: Now: $68.99 Add to Cart Quick view Details Mishimoto | sku: misMMTS-RAM-89H Mishimoto 89-93 Dodge 5.9L Cummins 87.5C High-Temperature Thermostat MSRP: Now: $53.95 Out of stock Quick view Details Mishimoto | sku: MMINT-RAM-03SL Mishimoto 03-09 Dodge 5.9L/6.7L Cummins Intercooler (Silver) MSRP: Now: $1,356.99 Add to Cart Quick view Details Mishimoto | sku: MMINT-RAM-03BK Mishimoto 03-09 Dodge 5.9L/6.7L Cummins Intercooler (Black) MSRP: Now: $1,356.99 Add to Cart Quick view Details Mishimoto | sku: MMTC-RAM-03SL Mishimoto 03-09 Dodge Ram 5.9L/6.7L Cummins Transmission Cooler MSRP: Now: $602.99 Add to Cart ×
Quick view Details Mishimoto | sku: misMMTS-RAM-89L Mishimoto 89-93 Dodge 5.9L Cummins 79C High-Temperature Thermostat MSRP: Now: $68.99 Add to Cart Quick view Details Mishimoto | sku: misMMTS-RAM-89H Mishimoto 89-93 Dodge 5.9L Cummins 87.5C High-Temperature Thermostat MSRP: Now: $53.95 Out of stock Quick view Details Mishimoto | sku: MMINT-RAM-03SL Mishimoto 03-09 Dodge 5.9L/6.7L Cummins Intercooler (Silver) MSRP: Now: $1,356.99 Add to Cart Quick view Details Mishimoto | sku: MMINT-RAM-03BK Mishimoto 03-09 Dodge 5.9L/6.7L Cummins Intercooler (Black) MSRP: Now: $1,356.99 Add to Cart Quick view Details Mishimoto | sku: MMTC-RAM-03SL Mishimoto 03-09 Dodge Ram 5.9L/6.7L Cummins Transmission Cooler MSRP: Now: $602.99 Add to Cart ×
Quick view Details Mishimoto | sku: misMMTS-RAM-89H Mishimoto 89-93 Dodge 5.9L Cummins 87.5C High-Temperature Thermostat MSRP: Now: $53.95 Out of stock Quick view Details Mishimoto | sku: MMINT-RAM-03SL Mishimoto 03-09 Dodge 5.9L/6.7L Cummins Intercooler (Silver) MSRP: Now: $1,356.99 Add to Cart Quick view Details Mishimoto | sku: MMINT-RAM-03BK Mishimoto 03-09 Dodge 5.9L/6.7L Cummins Intercooler (Black) MSRP: Now: $1,356.99 Add to Cart Quick view Details Mishimoto | sku: MMTC-RAM-03SL Mishimoto 03-09 Dodge Ram 5.9L/6.7L Cummins Transmission Cooler MSRP: Now: $602.99 Add to Cart ×
Quick view Details Mishimoto | sku: MMINT-RAM-03SL Mishimoto 03-09 Dodge 5.9L/6.7L Cummins Intercooler (Silver) MSRP: Now: $1,356.99 Add to Cart Quick view Details Mishimoto | sku: MMINT-RAM-03BK Mishimoto 03-09 Dodge 5.9L/6.7L Cummins Intercooler (Black) MSRP: Now: $1,356.99 Add to Cart Quick view Details Mishimoto | sku: MMTC-RAM-03SL Mishimoto 03-09 Dodge Ram 5.9L/6.7L Cummins Transmission Cooler MSRP: Now: $602.99 Add to Cart ×
Quick view Details Mishimoto | sku: MMINT-RAM-03BK Mishimoto 03-09 Dodge 5.9L/6.7L Cummins Intercooler (Black) MSRP: Now: $1,356.99 Add to Cart Quick view Details Mishimoto | sku: MMTC-RAM-03SL Mishimoto 03-09 Dodge Ram 5.9L/6.7L Cummins Transmission Cooler MSRP: Now: $602.99 Add to Cart ×
Quick view Details Mishimoto | sku: MMTC-RAM-03SL Mishimoto 03-09 Dodge Ram 5.9L/6.7L Cummins Transmission Cooler MSRP: Now: $602.99 Add to Cart