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Your cart is empty.The Mishimoto racing thermostat for the 2001+ Subaru Impreza WRX and STI will promote greater cooling efficiency throughout your engine.The Mishimoto racing thermostat will significantly lower high engine temperature produced by modified and upgraded turbo applications.Once the engine is fully warmed up the Mishimoto racing thermostat will open up at a lower temperature than standard thermostats, also allowing the coolant to flow through the engine sooner thus reducing and maintaining cooler engine temperatures.
Jr J
Reviewed in the United States on June 26, 2024
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AJ Avalanche
Reviewed in the United States on May 10, 2024
Fits as it should and works as designed, however, it opens at a lower temp than OEM, resulting in check engine lights for the engine not warning properly. Might be good if you're racing, but not if you're stock.
Vitas
Reviewed in Canada on March 20, 2022
decrease engine temp but u will get a check engine light
Mr Sajid Akhter
Reviewed in the United Kingdom on September 11, 2021
Its a great product for helping to loer engine temperature,
SubieBro
Reviewed in the United States on December 30, 2018
Works great and installed just the same as OEM replacement. have yet to see temperatures reach that of OEM thermostat even on hot track days. Works better with mishimoto radiator and fans! would not recommend on stock subaru as it will take a long time to reach operating temperatures.
Dana Allen
Reviewed in the United States on March 6, 2013
Installed very easily, has the WRX running nice and cool so far. Watched 3 cars overheat in a traffic jam, I didn't even get up to the mid point.Add: After about 3 months of having this installed, I have an additional piece of info to add. I would only recommend this for racing applications. For a daily driver I am having an issue with it tripping a CEL coding as engine collant temp too low. Alone it may be fine, but when paired with the grimspeed radiator it prevents the car from reaching correct operating temp in normal driving, especially highway with fairly low ambient temps (57 or so). Just a little extra info for those of you considering it. It still works exactly as it should, just not right for my application.
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