The Mishimoto racing thermostat is precision engineered to improve the cooling efficiency of your stock or modified Lexus. Whether you are cruising down the highway in your GS300 or terrorizing the local road course in your boosted IS300, the Mishimoto Lexus low-temperature thermostat is an ideal upgrade for reducing coolant temperatures. Once the engine is fully warmed up the Mishimoto racing thermostat will activate at a lower temperature (68° C) than standard thermostats. This allows coolant to flow through the engine sooner, thus reducing and maintaining cooler engine temperatures. The Mishimoto racing thermostat will help keep your 2JZ powered Lexus on the road and out of the shop.