- Direct fit for the 2014–2019 Ford Fiesta ST
- Lower activation temperature allows coolant to flow through the engine earlier, maintaining lower temperatures
- Mishimoto thermostat activates at 160°F vs. stock 207°F
- Mishimoto Lifetime Warranty
Keep your Fiesta running cool with the Mishimoto low-temperature Fiesta ST thermostat. Optimal engine temperatures are imperative to achieving peak performance. This Fiesta ST thermostat activates at 160°F vs. the stock 207°F, allowing the coolant to flow through the engine earlier. When you’re out hot lapping at the track, a lower temperature thermostat will be beneficial in keeping engine temps down. When paired with the Mishimoto Fiesta ST Aluminum Radiator, your Fiesta will maximize cooling efficiency. This Fiesta thermostat, like all our Fiesta ST parts, includes the unparalleled Mishimoto Lifetime Warranty.
(1) Mishimoto Thermostat
(1) Spring Plate
(2) Rubber O-Rings
Mishimoto Lifetime Warranty
The installation of this thermostat requires the use of the Motorcraft RH-223 housing. The stock thermostat must be removed and the Mishimoto thermostat installed in its place.