Mishimoto high Performance intercooler, watercooler, oilcooler and oil-catch cans Racing Thermostat Mishimoto for Subaru WRX and STI / 01+ MMTS-WRX-01 Mishimoto high Performance intercooler, watercooler, oilcooler and oil-catch cans Category: Racing Thermostat Mishimoto Activation Temperature: 68°C Engine Codes: EJ205 EJ255 EJ257 EJ253 EJ25D EJ251 EJ222 EJ252 EZ30D EZ36D Chassis No.: GC GSA GD GR GF GM GG GE GH Fits: Subaru Baja 03-06 Subaru Forester 97-10 Subaru Impreza 93-10 Subaru Legacy 89-10 Subaru Outback 00-10 Subaru SVX 93-97 Subaru Tribeca 06-10 The Mishimoto Racing Thermostat for the 2001+ Subaru Impreza WRX/STI will provide your engine with significantly better cooling efficiency. The Mishimoto Racing Thermostat will substantially reduce high engine temperatures generated by modified and upgraded turbos. When the engine is fully warmed up, the Mishimoto Thermostat opens at a lower temperature than the standard thermostat, allowing coolant to flow through the engine earlier and maintain cooler engine temperatures.