The Mishimoto racing thermostat for the Evolution X will promote greater cooling efficiency throughout your engine. A Mishimoto racing thermostat will significantly lower high engine temperature produced by modified and upgraded turbo applications. Once the engine is fully warmed up the thermostat will open up at a lower temperature (63º C) than standard thermostats (82°C), also allowing the coolant to flow through the engine sooner thus reducing and maintaining cooler engine temperatures.