CSF BMW F8X M2C/M3/M4 Top Mount Charge-Air-Cooler - Crinkle BlackThis top mount intercooler from CSF is a must for any FBO F8x M2C M3 M4 looking to keep temps low and boost high. The factory intercooler poses many problems such as the utilization of plastic, not to mention it's notorious for heat soak issues. The factory cooler is also notorious for leaking internally, causing coolant to leak into the J pipe and into your engine! This is something that is often under reported that we have seen countless times when