My understanding is that any of the items available from the M Performance catalog here;
Will be fitted by BMW at the landed USA port, VDC, prior to being shipped to your dealer.
Upside is that build reflects these parts (but not the Monroney funny enough) and you save on fitting labor.
Downside they keep your existing/previous exhaust.
'13 535i, Santorini Blue, Black Nappa, Leather Dash, M-Sport, Tech, Heated Seats, Luxury Seating, PDC, 6MT, M Performance Exhaust, ED May 8.
'06 Carrera, Maritime Blue
'02 525i Sport Wagon, Sport, Premium, Comfort, 94xxx miles - gone to a good home.