The Mishimoto MMTSWRA03L is a racing thermostat that opens at a lower 180F, cross-referencing OE part 11537596787. Lowering the thermostat's opening temperature helps keep coolant temperatures down under sustained hard driving or track use, which can reduce the likelihood of heat-related power loss and engine wear on high-mileage or hard-driven cars.

Fitment: Direct fit for the 2002-2008 MINI Cooper and Cooper S, chassis R50, R52 and R53, with the 1.6L Tritec-derived W10 (naturally aspirated) and W11 (supercharged) engines — this is not a Subaru WRX/STI (EJ20/EJ25) part as originally listed.