CSF F8X M3 / M4 / M2 Comp Top Mount Charge-Air-Cooler - Raw FinishShop 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 suffers heavily from heat soak. Many tuners witnessed this early on after doing multiple dyno pulls and seeing significant drops in power after each consecutive pass. Many F8X owners experienced the same loss of power on the track as the engine just could not cool off during