The Mishimoto racing thermostat for the 2005-2010 Scion tC will promote greater cooling efficiency throughout your engine. The Mishimoto racing thermostat will significantly lower high engine temperature produced by modified and upgraded turbo applications. Once the engine is fully warmed up the Mishimoto racing thermostat will open up at a lower temperature than standard thermostats, also allowing the coolant to flow through the engine sooner thus reducing and maintaining cooler engine temperatures.Fits the 2005-2012 Scion tCLower activation temp allows coolant to flow through the engine earlierMaintains lower temperatures and extends engine lifeMishimoto Activation: 154.4°F (68°C) / OEM Activation: 180°F (82°C)Mishimoto Lifetime Warranty