The Mishimoto racing thermostat for the 2013+ Subaru BRZ / 2021+ Toyota GR86 / 17-20 Toyota GT86 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 / GR86 / GT86 / 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.