Active Autowerke F8X S55 CNC Aftercooler Cooling KitBMW's S55 motor is a modern marvel but one weak point (beside the weedeater sound which is easily corrected with one of our midpipes) we've identified is the entire cooling system for the intake which comprises the charge pipe, the aftercooler and the heat exchanger (or radiator). Finally there is a S55 aftercooler kit upgrade that is good enough to carry the Active Autowerke brand. Years of success in developing cars for motorsport has allowed Active