Really nice demonstration videos.

Very smooth with the AR pipes.

Quite a bit more vibration with the modified stock pipes. Stephen I just answered your private message to me. Perhaps your engine/ ECU set up requires a slightly more opened up exhaust to run smoother. So your idea of making the holes of the posterior baffle larger is a good one.

2015 M3W, Morgan Aero Racing Stage 1, Garage 56 Stage 2, sport black, saddle tan, jeweled SS dash.