CSF BMW F8X M3 / M4 / M2 Comp (DCT) Transmission CoolerShop genuine CSF products through CenCal with confidence. Orders are fulfilled and shipped directly by CSF, ensuring fast processing and accurate delivery every time. The engineers at CSF know cooling. So when it comes to keeping your transmission temps down as you push your F8X M3 M4 M2 Comp hard on the street or track, the CSF Trans Cooler is the obvious choice. With an increase in cooling efficiency of around 30%, you can drive with confidence