For all those in the UK who suffer the clonk and think the sound could be better but don't know the solution.
Well there is one but let me tell tell you first that the modification which BMW does will not eradicate it 100%. It merely improves it. The modification on my car was done early last year.
I stuck with it for a year but i was getting more and more frustrated with both issues.
So I shelled out the money and installed Schnitzer springs and the new twin 90mm exhaust (export version).
Omg the transformation is beyond words. 25mm lower. Looks amazing on side view. No more clonk, no more body roll on turns and no nose dive on braking.
On top of that the sound is mind blowing.