One of the main reasons the M3 is on another level is the S55's ability to keep its cool, especially when it comes to the intercooling system. BMW equipped the F8X generation of the M3 and M4 with a state-of-the-art air-to-water intercooling system for a more efficient means of keeping the charged air cool, but before we dive into our plans for besting the F80's heat exchanger, let's take a look at what an air-to-water system even is.
The Cool Factor
The process of air-to-liquid intercooling has been around for some time now, but it wasn't until recently that we started seeing this method on mass-produced vehicles. It was originally for super high horsepower engines, however, its advantages have trickled down to cars that we now see on the road every