The Mishimoto racing thermostat for the 1989 - 1995 Mazda RX - 7 will promote greater cooling efficiency throughout your engine.The Mishimoto racing thermostat will significantly lower high engine temperature produced by modified and upgraded turbo applications.Once the engine is fully warmed up the Mishimoto racing thermostat will open up 14 C lower than OEM thermostats, allowing the coolant to flow through the engine sooner thus reducing and maintaining cooler engine temperatures.