The Mishimoto racing thermostat for the 2012 Subaru BRZ Scion FR - S will promote greater cooling efficiency in your stock or modified FA20.Once the engine is fully warmed up, the Mishimoto racing thermostat will open at a lower temperature than standard thermostats.This allows coolant to flow through the engine sooner, which reduces and maintains cooler engine temperatures.The Mishimoto BRZ FR - S racing thermostat is the perfect addition to your street or track car and is a direct replacement for the factory thermostat.As with all our products, this thermostat includes the Mishimoto lifetime warranty.