You can look at my thread
for X4 M40i Stock Turbo i will be posting my GPS Performance Meter Results too.. Dyno is not enough for me, 0-60mph, 1/4 mile also tells the story.
My buddy
hardparker will be showing his Dyno's on his X3 FBO Pure STG2 Turbos Bootmod3 Flash as well + Dragy GPS Performance Meter results