Thermostat Tube – Replacement for S65 E9X M3

CNC machined coolant/water thermostat bypass to improve coolant/water flow through the engine for increased cooling on and off the track. Extensively tested on the One Lap of America 2010 event on an Active Autowerke supercharged E90M3.

Also used on Grand AM prepared E92 M3 race cars.

Easy plug and play installation.

Hard coat anodized for long life and reliability.