Check some of the videos on YouTube.
Also some cheaper version from China.
Also some cheaper version from China.
My car is not a turbo so that's not gonna work for me.In the end Mini Cooper tuned the throttle just fine for me. What I did by to increase the smoothness of acceleration was this.
Blow Off Valve Spring Upgrade for R56 Turbo Engine
It seemed to take much of the dead throttle out of it.