The F90 M5 & F9X M8 are truly worthy successors to the F1X platform. BMW’s S63 Twin-Turbo V8 is a tried and true power plant capable of big numbers. Like most turbo engines, cranking up the boost for those big gains creates a lot more heat. Fortunately for F9X owners, CSF is here to help keep those Intake Air Temperatures (IATs) down and your power up.