CSF Racing High Performance Aluminium RadiatorGiven the age of the E28 M5 and E24 M6, it is definitely worthwhile to upgrade the cooling system. The factory systems from the 80's were fine at the time, but cooling technology has come a long way since then. So if you're looking for the best possible cooling system, then look no further than the new CSF BMW E28 M5 E24 M6 High Performance All Aluminum Radiator. CSF has over 5 decades of experience manufacturing radiators. So when it comes to keeping