The guy remapped my ECU and he added only 10% of power. He said that is maximum allowance.
I will seaarch for a dyno in the area these days and post the graph.

One thing is for sure, the car feels more powerful.

I think that is what they do to the X6 5.0 with the performance package. Increase the power to exactly 10% by remapping. Try to calculate. Its exactly 10%.