Some M Performance parts for the 2017 530i and 540i were posted online today! (Up until today, the only product listed was the carbon fiber license plate frame.) One of which is the
M Performance Exhaust System priced at $1,975.
There's no direct link to the page, so you'll need to go to
http://www.shopbmwusa.com/BMW-M-PERFORMANCE and then filter by 2017 / 5 Series.