Subaru WRX 2001-2014 / STI 2001-2016 68 Degree Racing Thermostat Fits the 20012014 Subaru WRX & 20012016 Subaru STI Lower activation temp allows coolant to flow through the engine earlier Maintains lower temperatures and extends engine life Mishimoto Activation: 154F (68C) / OEM Activation: 170F (76.5C) Mishimoto Lifetime Warranty