Originally Posted by tomz_335i
I just decided to pull mine off and replace the internal cat, h pipe and all perforated pipes with straight pipes. Will post a video once I get it back from the shop in a few days (I have straight pipes on for the time being, they are loud as hell).
I did this and hated it. Everything in the cabin rattled and it was a loud sound, not a nice sound.
I threw my OEM one back on for the time being until I can come up with a solution.