CSF BMW F8X M3/M4 Front Mount Heat Exchanger w/ rock guard - BlackShop genuine CSF products through CenCal with confidence. Orders are fulfilled and shipped directly by CSF, ensuring fast processing and accurate delivery every time. The S55 power BMW F8X suffers heavily from heat soak. While the ideal solution is pairing the Front Mount Heat Exchanger with the Charge Air Cooler, you can still see significant improvements with just the Heat Exchanger. The ability for the system to remove as much heat as possible is