Part #:MMTS-RAM-99L

Mishimoto Low Temperature Thermostat
Applications: 99-13 Dodge 5.9L/6.7L Cummins


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.


Payment & Shipping
  • Immediate Payment is required
  • Florida Buyers will be responsible for 6% sales tax
  • Shipping is done Monday-Friday
  • Shipping cutoff each day is around 2pm eastern, but please allow up to 24 hours for your item to ship out.
  • Items Will be Shipped by USPS, UPS or FEDEX
  • Tracking Number will be provided and added to your eBay order
  • All special requests must be made prior to purchase
  • Buyer is responsible for entering the correct shipping info during checkout
  • Free shipping only applies within the continental 48 states and depending on item shipments to Alaska, Hawaii, Puerto Rico or any of the U.S. territories
  • International orders contact prior to purchase for shipping quote if shipping cost is not shown
  • International customers are responsible for duties, taxes, and customs clearance fees.

    Returns Policy
  • This Item is Brand New and must be returned in same condition with all original packaging intact
  • Restocking fee of 15% will be applied to all returns
  • Images of item are shown above may be actual or for product reference only.
  • If the Item Arrives Damaged contact us immediately and provide detailed pics