Mishimoto Racing Thermostat Subaru WRX 2015-2021 / Forester XT 2014-2017

Rated 5.0 out of 5
Based on 1 review
48 In stock
Cooling Thermostats

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Part: # MMTS-WRX-15

The Mishimoto racing thermostat for the Subaru WRX will promote greater cooling efficiency in your stock or modified FA20DIT. Once the engine is fully warmed up, the Mishimoto racing thermostat will open at a lower temperature than standard thermostats. This allows coolant to flow through the engine sooner, which reduces and maintains cooler engine temperatures. The Mishimoto WRX racing thermostat is the perfect addition to your street or track WRX and is a direct replacement for the stock thermostat. As with all our products, this thermostat includes the Mishimoto Lifetime Warranty.

165.2°F (74°C)

190.4°F (88°C)


Any returns for an exchange or refund will be allowed within 30 days from the receipt of your order and must be authorized prior to shipping with an RMA Number (Return Merchandise Authorization). To receive your return instructions and RMA# please use our online form under Returns and Exchanges! Once you receive your return instructions please ship out the item at your earliest convenience and provide the tracking number to your customer service rep. The customer will be responsible for all shipping fees. Before shipping your product back please make sure you package it up exactly how you received it and in all of its original packaging. All items must be in brand new and resalable condition. Once the item is received it will be inspected and a credit will be issued accordingly. All returns are subject to a 15% restocking fee. Any returns received without an RMA# will be charged a restocking fee and any shipping fees associated with the return. An item that does not ship directly from IIR's warehouse is considered a "special order" item and no returns will be authorized.

average rating 5.0 out of 5
Based on 1 review
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100% of reviewers would recommend this product to a friend
1 Review
Reviewed by Vp100_octanewrx
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

Simple mods go along way

Worth every penny. Best simple cooling mod you can do.

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Mishimoto Racing Thermostat Subaru WRX 2015-2021 / Forester XT 2014-2017
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