[Video] Hardcore BMW M4 GTS caught testing at Nurburgring

This is a footage of a hardcore BMW M4 GTS featuring some canards at the front, a more aggressive rear diffuser, a bigger rear wing and some Porsche 911 GT3 RS-style wheel arch vents. It was super quick at the ring and also sported an angrier sound. The M4 GTS was already the angriest sounding BMW on sale but this one sounds even more better, with a metallic growl!