Mishimoto 04-13 Mazda 3 Racing Thermostat - 68CThe Mishimoto racing thermostat for the Mazda 3 2004 2013 is designed to help your cooling system operate at peak efficiency, whether you're cruising to your local car meet or tearing up the track. Our thermostat begins to open 25. 2F (14C) earlier than the stock thermostat at 154. 4F (68C). That allows precious coolant to flow into the radiator and start shedding heat sooner. Couple this thermostat with a Mishimoto performance aluminum radiator and