Reische Performance Thermostat Performance 170 Degree V6/ GT 2011-2020/ Boss 302 2012-2013/ GT350/ GT350R 2015-2020

Reische Performance:
93% of 100


  • 170 Degree Thermostat
  • Direct-Fit
  • Includes New Gasket
  • OEM Style
MSRP $65.99
You save 14%

Reische Performance 170 Degree Performance Thermostat for 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 and 2020 V6 and GT Mustangs, 2012-2013 Boss 302 Mustangs and 2015, 2016, 2017, 2018, 2019 and 2020 GT350 and GT350R Mustangs.

This Reische 170° thermostat is custom made with the same size diaphragm and bypass control as the OEM units. This provides proper bypass control, which means maximum efficiency from your Mustang's cooling system. Each of these thermostats is carefully modified by hand, using only U.S. made parts and then quality inspected to ensure reliable and consistent opening temperatures. This Reische Performance 170 Degree Thermostat is a direct replacement for the old, standard issue thermostats in your late-model Mustang.

This Reische Performance Thermostat is intended to be used in vehicles that are running a custom tune. It is important that the fan settings in your tune are set up properly if you want to see the best possible heat dissipation from your cooling system. Otherwise, a low temperature thermostat will only be effective when the vehicle is moving because heat cannot be removed unless there is air passing through the radiator. Whether you are using an aftermarket radiator or not, this thermostat will provide the best possible heat dissipation from your setup, along with a faster warm up time and better cold weather performance than a 160° unit or a thermostat that merely had holes drilled in the diaphragm.

Beware of aftermarket companies who sell a general thermostat for all Ford modular engines. Reische Performance thermostats are the only ones designed precisely for a proper fit on each particular application, making them the best performing low temp units on the market! Typically with Reische’s 170° Performance Thermostat installed, your cooling fans should be set to turn on between 184-190° and shut off between 176-182° for optimal results, if not then re-flash your tune with the appropriate settings.

Vehicle Fitment:
- 2011-2020 V6 and GT Mustangs
- 2012-2013 Boss 302 Mustangs
- 2015-2020 GT350 and GT350R model Mustangs

The specialists at Reische believe that a 170° opening temperature provides the ideal balance for high performance engines, supplying high flow to your radiator by mid-180 temperatures while still providing good all season performance. With proper fan settings your coolant temperatures in cool weather should be in the 170s and in hot weather the 180s, giving those running high levels of timing and/or boost added protection against engine-damaging detonation as well as maximum power output.

*All Reische Performance thermostats ship with a new gasket and coolant ratio/additive recommendations.

California Residents: Proposition 65 Warning

Installation Videos

Video Transcript

We’re here with a Reische Performance 170 degree thermostat fitting your 2011-2015 Coyote Mustang and 2011-2015 Eco-boost F150.

The Reische Performance high performance thermostat is a great choice for improving the cooling performance of your 5 liter Coyote or your Eco-boost F150. It would be a direct replacement for the factory one, but operates at a lower temperature, which is going to improve the cooling system. Use a factory-size diaphragm and a factory-style by-pass, so it will operate just like the original.

Reische Performance does recommend custom tuning so you can modify the temperature at which your fans come on for optimum performance with their thermostats.

Vehicle Fitment

This product will fit the following Mustang years:

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