Originally Posted by W Cole
This may be what I end up doing. I'm most concerned with the "BMW inspection."
It looks like it may be difficult to cut them open and weld a straight pipe inside as the inlet side of the cat is oblong shaped..
LOL and you dont think they will notice the sound difference? Theyve seen 100's of M3's and know the sound of a stock one vs one with the cats cleaned out. Stock appearance or not. Sound wont fool anyone.