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Mishimoto High Temperature Thermostats (Both) 2001-16 Duramax

Fits 2001–2016 Chevrolet/GMC 6.6L Duramax
Activates at a higher temperature, allowing engine temperatures to rise
Ideal for colder climates
Allows for cooler engine temperatures
Mishimoto Lifetime Warranty
Pricing: $83.95
Free Ground Shipping for orders over $75.00 Lower 48 States (some exclusions apply)


The Mishimoto Chevrolet Duramax high-temperature thermostats activate at a higher temperature than the OEM thermostats, making them the perfect solution for Duramax owners who live in colder climates or have trouble reaching operating temperatures. Activating at a higher temperature means the thermostats will allow the coolant to stay in the engine longer delaying the coolant flowing through the radiator, which allows the engine to warm up sooner.

Purchase Includes:

(1) 185° F Thermostat
(1) 191° F Thermostat
Mishimoto Lifetime Warranty


2001-2016 Chevy or GMC with 6.6L Duramax Engine (Any)
2001-2016 Chevrolet Silverado 2500HD/3500HD
2001-2016 GMC Sierra 2500HD/3500HD


Mishimoto Automotive (“Mishimoto”) warrants its products under this lifetime limited warranty policy (“Warranty Policy”). This Warranty Policy applies solely to: (i) Mishimoto Products purchased directly from Mishimoto or Mishimoto authorized dealers (each a “Mishimoto Product” and collectively, the “Mishimoto Products”) and (ii) the original purchaser of such Mishimoto Product (“Purchaser”). This Warranty Policy is non-transferable and all claims under this Warranty Policy must be accompanied by the original sales receipt. The terms and conditions of this Warranty Policy are subject to change by Mishimoto at any time without notice.

Shipping Information

  • Item Requires Shipping
  • 5.0 lbs.
  • W6.0000” x H4.0000” x L3.0000”
  • Free Ground Shipping for orders over $75.00 Lower 48 States (some exclusions apply)

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