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Review on 🏎️ Mishimoto MMTS-WRX-15 Racing Thermostat: Enhance Performance for Subaru WRX 2015+ (Silver) by Carson Zoberman

Revainrating 1 out of 5

It's parts bullshit

This thermostat is bullshit. I installed it on my 2016 wrx and in less than 30 days of careful driving the internal brass assembly cracked in half. The thermostat has NEVER worked as advertised. The temperature was either too high or too low. To top it off, Mishimoto's customer service is the worst. If you want to risk the engine, then do it. Otherwise go to the OEM.

Pros
  • Lower activation temperature allows coolant to flow through the engine sooner
Cons
  • Almost everything is fine