It is amazing how the horsepower numbers have grown. I would have thought that 400hp would be just fine. Compared to 10 year ago, the 528 is a very strong performer, never mind the 550. I can only imagine what will be available 10 years from now.
2012 535xi M-Sport, Carbon Black, Cinnamon-Alum Hex, Exec Pack, Tech Pack, HUD, Damper Control, BMW Apps, Heated Rear Seats, BMS Tune