CSF Racing Triple Pass Aluminium RadiatorBMW F87 M2 F2X M235i F3X 335i 435i (N55 incl xDrive) Race Spec Radiator CSF has over 5 decades of experience manufacturing radiators. So when it comes to keeping your engine cool and your N55 Powered BMW running at its best, a CSF High Performance All Aluminium Radiator is the obvious choice. Designed to perform on the street or at the track, a performance radiator is a must have for both high horsepower builds as well as race vehicles which need