Whether you drive a 1.8L Protege daily or track a turbocharged Mazdaspeed, a reliable cooling system is a must for repeatable, dependable performance. A Mishimoto racing thermostat is the ideal upgrade for improved cooling reliability and efficiency. Mishimoto racing thermostats promote greater cooling efficiency by significantly decreasing high engine temperatures. Once the engine is fully warmed up, the Mishimoto racing thermostat will open at a lower temperature (169F) compared to standard thermostats (180F). This allows coolant to flow through the engine sooner, thus reducing and maintaining cooler engine temperatures. Mishimoto thermostats are digitally calibrated, feature high-quality wax to ensure precise and consistent opening temperatures, and include a gasket for seamless installation. As with all our products, this thermostat includes the Mishimoto Lifetime Warranty