Mishimoto Low Temperature Thermostat for 1991-1996 Infiniti G20 1995-1998 Nissan 200SX Racing Low-Temperature Thermostat (MMTS-240-89KA) by Mishimoto®. Temperature: 154.4F. Mishimoto racing thermostats promote greater cooling efficiency by significantly decreasing high engine temperatures resulting from modified and upgraded turbo applications. Once the engine is fully warmed up, the Mishimoto low-temperature racing thermostat will open at a lower temperature than standard thermostats. This allows the coolant to flow through the engine sooner, thus reducing and maintaining cooler engine temperatures.