Colder Upgraded 170* Thermostat - Ratstat 4D V1 | MPT Performance
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170 Thermostat
170 Thermostat

Colder Thermostat Upgrade 170* Ratstat 4D V1

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$48.99
A colder 170-degree thermostat will give you the low coolant temps and heat dissipation needed to get the most out of your Ford vehicle.
Part Number: Ratstat-4DV1

Ratstat 170 Performance Thermostat - 4D V1


Fits the following:
  • 2011-2014 F150 3.7L
  • 2011-2017 F150 5.0L
  • 2011-2014 F150 EcoBoost 3.5L
  • 2015-2017 F150 Ecoboost 2.7L
  • 2011-2017 Mustang 3.7L V6
  • 2011-2017 Mustang GT 5.0L

Heat is known to be a common enemy of power. Keeping both intake and coolant temps low are a good idea on basically every application. The Ratstat 170-degree thermostat will give you the low coolant temperatures needed to get the most out of your Ford vehicle. Having a lower temp thermostat, means coolant flowing earlier and then when coupled with the correct calibration fans kick on earlier as well.

An upgraded thermostat is one of the most commonly recommended products by MPT. Cooler temps allow more consistent power and prevent the power loss associated with hotter temps.

The ratstat includes a 2-year manufacturers warranty.

NOTE: This 170-degree thermostat is a different size and designed differently than the OEM thermostat. This is due to a different gasket being used in the construction of the thermostat. Install as is and it will fit correctly.


To fully take advantage of this upgrade the PCM/ECU will need to be calibrated with an MPT tune. If you already have a tune from MPT, simply submit a new MPT Tune Form telling us what you have installed and your invoice number for the thermostat purchase. Please allow three business days for tunes to be built/updated.