Mishimoto has developed a racing thermostat specifically designed for the LT1/LT4 Chevrolet engine. Mishimoto racing thermostats promote greater cooling efficiency by significantly decreasing high engine temperatures. Once the engine is fully warmed up, the Mishimoto low-temperature racing thermostat will open at a lower temperature (160 degree Fahrenheit) compared to standard thermostats (180 degree Fahrenheit). This allows coolant to flow through the engine sooner, thus reducing and maintaining cooler engine temperatures. Whether you take your vehicle to the track or to a show, a reliable cooling system is a must..