If you track your car you want to keep it running cooler to make more power. Keeping the engine cooler is a known method of retaining that HP, especially in warmer climates. This Original BMW Motorsport thermostat will help you do just that.
Fits S54 and S50 Euro:
E46 M3, Z3 M Coupe/Roadster, Z4 M Coupe/Roadster, E36 S50 Euro (3.0l & 3.2l) - WILL NOT FIT US E36 MOTORS!
