Lower activation temp allows coolant to flow through the engine earlier As with all our products, this thermostat includes the Mishimoto Lifetime Warranty, ensuring superior product quality and craftsmanship. 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). DMC 437 - Light Tan, 6 Stand Emboidey Floss 100% Cotton 8.7 Yads Pe Skein (3.8k) $1.05 Improve the reliability of your 5.9L/6.7L cooling system with a Mishimoto Dodge 5.9L/6.7L Cummins Low-Temperature Thermostat! Mishimoto Thermostat... 99-13 5.9L/6.7L Dodge Cummins Low Temperature Thermostat This thermostat is ideal for use in warmer climates or under extreme towing/driving conditions. 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! Direct fit for 1999-2013 Dodge Ram with 5.9L/6.7L Cummins Mishimoto Thermostat Mishimoto #MMTS-RAM-99L Dodge 5.9L/6.7L Cummins Low-Temperature Low Temperature Thermostat