Autoevolution reports that BMW is preparing an M4 GTS track-ready car. No other details were reported but some of the things we all expect are around more lightweight techniques that will make the M4 even more track focused. The chassis will also go through a special tuning to bring it closer to racing specs, carbon ceramic brakes, a rear wing to help with downforce and potentially a slight tune to give the car a power boost.
Source: Autoevolution