The M Performance Power Kit raises output to a claimed 355 horsepower and 370 lb-ft of torque. Considering the car is already making more power and torque than that without the power kit as it dynos 331 rear wheel horsepower and 339 lb-ft of torque at the wheels we can only imagine what the actual output is with BMW's power bump.
Let's assume gains of another 20 wheel horsepower and 20 lb-ft of torque at the wheels. To find out for sure we will need to see a dyno but there is no denying the car moves very well in the video below.
Keep in mind this is an xDrive model which is heavier due to the all wheel drive system. That just makes the 0-200 kph acceleration all the more impressive: