First things first here was my inspiration
http://www.e90post.com/forums/showthread.php?t=739970
I decided I wanted to do it and since I got a GoPro for Christmas I can share the results with you guys
Here are some things to know
1. Mufflers had packing in both sides (e90)
2. Left stock resonator there to control rasp
3. Removed 99% of packing left only a handful in each muffler. Just enough to coat the bottom of the muffler
4. Didn't touch any piping
5. Zero drone (6at so I'm very happy)
6. I am very happy with it so far no regrets
(Sorry I can't figure out how to embed the damn video and im to tired to care
)