The Mishimoto racing thermostat for Scion tC opens at 155°F (68°C), lower than many stock thermostats, allowing coolant to circulate earlier and helping reduce high engine temperatures in modified or turbocharged setups. The unit is specified to fit Scion tC model years listed by the manufacturer and promotes greater cooling efficiency by maintaining cooler engine temperatures once warmed up.
Mishimoto 05-10 Scion tC 155 Deg F / 68 Deg C Racing Thermostat