These pictures were uploaded to BimmerPost earlier this evening by an individual who will remain anonymous. He had only this to say:
"They are shooting a commercial of the
M4 CS in California with Augusto Farfus right now."
No way to prove this is legitimate but it looks to be the real deal - large front lip, high trunk spoiler, GTS style vented hood, carbon ceramic brakes.
I think the car looks great in this blue color. While it does resemble San Marino, I have to wonder if it's actually the new
Marina Bay Blue coming to the F90 M5.
Shots of the M4 CS prototype: