SPIED: BMW M4 GTS spotted testing at Nurburgring

As we reported earlier, the BMW Concept M4 GTS had just been revealed at the 2015 Pebble Beach Concours d’Elegance, and apparently, a production version of the concept will soon be rolling out in the guise of its racetrack-tuned predecessors such as the BMW M3 CRT, M3 GTS and M3 CSL. Now we have a slew of images of the […]