Hi all!
Me and some guys in Germany modified the Intake Silencer

.
Now I saw at realoem that american MINIs have the same "thing" installed.
What we did ... we modified the part #12.
1.
Remove the silencer.
2.
Look inside and you will see these holes on the top of the silencer.
3.
Take some tape and close the holes with it.
I used a srewdriver to fix the tape because there was no chance to get in with my hands.
4.
After mounting the tape it looks like this.
After that re-install the silencer and have fun.
Between 2000rpm and 5000rpm it sounds really great!
Cu
Chris