CSF Racing Race-Spec Dual-Pass DCT Transmission CoolerBMW F87 M2 (N55 DCT) Race Spec Dual Pass Transmission Cooler The engineers at CSF know cooling. So when it comes to keeping your transmission temps down as you push your F87 M2 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 knowing you won't be damaging your expensive transmission due to overheating. The CSF #8103 Cooling product is designed