I'll be driving to Road Atlanta next year for the Petit to see this beast tear up the track. Road Atlanta is a fun track! What a badass M3.
Wheels in those pics are def BBS. Here is a link
to some shots around the same day with the Rays wheels. What I've noticed, not sure if you guys have as well is that BMW has has changed the exhaust to a mid side exit. Initial pics had the exhaust coming out the back. Aston, Panoz run a similar set up in the GT2 class.