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 an MPT Tune, 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.

2013 F150 5.0. I monitored my coolant temps with my Ultrguage before install of thermostat. Truck temps 199-205 after install 185-186.8 and it's been hot in S Florida. As usual MPT was great to deal with and their customer support is a big reason why I choose o do business with them.

Did you find this helpful? 1 of 1 Found Helpful

Reviewed by: Rich from S Florida. on 6/24/2019

Ratstat 170 on F150 Ecoboost

This is a great thermostat and keeps the coolant temperatures down. The installation takes a little time due to the location in the engine bay, but it's absolutely worth it. I definitely recommend this addition to your truck.

Did you find this helpful? 1 of 1 Found Helpful

Reviewed by: Brandon from OH. on 6/24/2018

Great product! Easy to install! Took more time to move the intake piping and stuff than to install the thermostat. Truck definitely runs cooler and smoother!

Did you find this helpful? 1 of 1 Found Helpful

Reviewed by: Zachary Foster from Amite. on 5/25/2018

shop owner

thermostat worked awesome! we did heads on a 5.0l coyote motor and this therm keep our head temps down and high speed from running all the time. the tech the time to talk to me about it before the we bought it thank you

Did you find this helpful? 1 of 1 Found Helpful

Reviewed by: gary cameron from micco fl. on 4/30/2018

Fastest Shipping & Lowest Price!

I live in the sauna that is South Florida, so keeping my engine warm enough is never the issue. I ordered one of these on Tuesday afternoon and it got to my doorstep Thursday afternoon, so it could not have gotten here any faster unless I drove to Longwood myself and picked it up.

Did you find this helpful? 1 of 6 Found Helpful

Reviewed by: Derek Snyder from FLORIDA. on 8/23/2017

Great product. My cyl head temp went down to 185-190 degrees ,daily driving, (90 degrees ambiant temp) .Previously 203 plus. Was easy install . TIP; I made a 2" plug to put in the radiator hose, to stop the gushing of fluid, (I only lost about 1/2 ltr) ,also covered the serp belt and alternator real good and did NOT have to "burp" system. Loaded my MPT updated tune, done. Total turnaround 4 days! Could not be happier!

Did you find this helpful?

Reviewed by: (Verified Buyer) David Daniels from HAVERHILL. on 7/14/2020

Great compliment to an MPT tune

Easy to install on my 2016 Coyote F150, fits perfect with the included gasket and does exactly what it says. Updating the tune with MPT was simple.

Did you find this helpful?

Reviewed by: David Cardis from Port St. Lucie, FL. on 12/7/2019