Review on 🏎️ Mishimoto MMTS-RX8-04L Racing Thermostat for Mazda RX-8 2004-2011: Enhanced Performance and Compatibility by Rich Rickenbaugh

I used to trust Mishimoto. But I think maybe this time I cost myself my engine. After installation, along with other parts, I had problems with cooling. I took it off and didn't leave the thermostat running and the car is struggling to keep the temperature. Then I decided to test it together with the normal one. Stem broken at 86°C (spec: 82°C). Mishimoto never opened even when I simmered it at 95°C (spec: 76°C). Go to your local auto parts store, a good employee will help you find the lower temp right size and OE quality. I'll post the part number I found.