[BrettKA7]

Bump.

I did the opposite of this thread on my M240i. On the F22 chassis, we can essentially hear 90% ASD and 10% actual exhaust sound. I wanted a little more so I popped the rear panels off and removed these aluminum plates.

Here are some photos of what exactly is inside these holes! I did get about 20% more exhaust noise and about 5-10% more road noise by removing these plates. Not sure how exhaust sound makes it through these holes, but it does.