It was just a matter of time until artists started flooding the internet with various renderings of the M4.
Now, with the nice coverage of the vehicle on the Detroit stage, they have pretty much all the information they need to make some nice, and also possible, body kits for the M4.

The one Duke Dynamics presented recently is a very nice example of what we would like aftermarket specialists to build. Called the MD4, this rendering presents the M4 with a brand new front bumper with the mandatory carbon fiber front splitter.
Add a vented hood, new side skirts and redesigned wheel arches plus the new rear bumper with diffuser and boot lid spoiler, and you get a complete body kit that looks quite amazing. If this particular design ever sees daylight at the hands of Duke Dynamics is uncertain. But if they do decide to go for it, it will be interesting to see what (if any) fiddling will be done under the hood.