Originally Posted by edu09
You may have to tighten the bolts, your exhaust is probably loose, I dont have any problems with vibrations, drone or expansion on my exhaust
You were right, thanks a lot.
The garage shop around the corner just put my M on their auto lift.
One connecting pipe was twisted and one clamp was loose.
It looks like the drone is gone now. I will see tonight, when I drive home from the office.