Finally.....!!!!!
Saw this at the 'Ring a few weeks ago in a disguised version of the regular E92, without the huge rear carbon spoiler, but with the new wheels and the stripped out interior. It sounded IMMENSE - a more metallic sound that the regular E92 M3, higher-pitched and louder. Walked away from the regular M3 that was chasing it going up the hill at Breidscheid