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Mishimoto Racing Thermostat 2002-2014 WRX/ 2004-2021 STI / 2005-2009 LGT / 2004-2005 FXT / 2009 FXT

Save $14.27 Save $14.27
Original price $70.22
Original price $70.22 - Original price $70.22
Original price $70.22
Current price $55.95
$55.95 - $55.95
Current price $55.95
88 In Stock, Usually Ships within 1-2 Business Days


The Mishimoto racing thermostat 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.


Customer Reviews

Based on 11 reviews
Conner Randall
Works wonders

Works as designed, if not better. Noticed immediate difference and results. Word to the wise though, can cause check engine light if you have no MAP loaded. Installed on my stock STI and got a CEL once or twice since it takes longer to get up to temp.


It is great to hear that the Mishimoto Racing Thermostat is delivering noticeable improvements in performance for your STI! Thank you for sharing your 5 Star Review and experience!



Works so good


Thank you for taking the time to leave a 5 Star Review of the Mishimoto Racing Thermostat! We are glad it is working well for you!


Philip Gagnon
Great for track use

Perfect for keeping temps down on longer track days, be careful if running this in colder temps.


The Mishimoto Racing Thermostat is a great choice for track use! It helps keep temperatures down during longer track sessions, which is crucial for optimal engine performance and reliability. Your note about being cautious in colder temperatures is valuable advice to ensure proper engine warm-up and operation. Thank you for your 5 Star Review! Enjoy the enhanced cooling performance during your track days!


Wes Keen
Everything at once

Since everything on the front was coming off. I did the timing belt kit with water pump from gates racing. The kit was great and had good instructions. Oil pump from IAG it was top notch as expected from them and larger radiator from Mishimoto it’s huge compared to the factory one and it mounted up perfectly along with new Mishimoto hoses and belts.


We are glad to hear that you had a positive experience with the Mishimoto Racing Thermostat! Mishimoto offers a wide variety of quality products!


Great performance

Great product! would highly recommend replacing this at the same time as your radiator!


Thank you for the 5 Star Review! We are glad to hear that you are satisfied with the performance of our Mishimoto Racing Thermostat for your vehicle. We couldn't agree more that it is important to replace your thermostat and radiator together for optimal performance. Thank you for choosing Subimods for your maintenance needs!


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