Turbos respond well to a less restrictive exhaust. The new F56 is not as well know as far as mods go. It may take a while for the aftermarket to catch up. I'd try contacting different makers to see what gains they are seeing. Take what you read with a grain of salt, folks selling things sometimes exaggerate a bit.
It is interesting hear how your autobox works well in solo use. Will your car let you use the brake & gas at the same time? If it does the left foot braking is there to use. Most all cars now have the built in nanny keep you from doing that.
Good luck uncorking some more pony's out of your MINI & good luck in the coming autox season.
