As much as i love my G56 exhausts for the perfect noise and build quality, on my car they are definitely "a bit wobbly", to the point of stretching a couple of the bottom side panel rivets.
I've just tried these extra little mounts from the bottom bobbin bolt to the floor bolt using stainless steel bar. The results are great removing the flex in the side skin so its just the bobbing's doing their job.
Visually you would be hard pushed to notice them so well pleased with the result.
[Linked Image]
[Linked Image]
[Linked Image]