At about 2800 rpm the X5M shows 122 pound-feet of torque at the wheels over the stock tune. That is an absolutely massive torque gain from just an ECU tune. Peak torque rises to 502 pound-feet of the wheels over 401 at the wheels stock for a gain just over 100 pound-feet. The peak horsepower figure goes to 386 at the wheels from 359 stock. Not a huge horsepower gain but this one of those times where the torque graph through the rpm curve tells the story showing large gains before the torque starts to drop off toward redline.
Keep in mind these are Dyno Dynamics numbers. The baseline shows comparatively low peak horsepower and torque figures versus say something like an all wheel drive Dynojet. This is why the Dyno Dynamics has the heartbreaker reputation as when it is not set to come crazy correction factors the numbers tend to be lower than most other popular dynamometers. All dynos are not created equal but what you should focus on is not the peak numbers but the delta here.