The AA midpipe is a must for any BMW M3, M4 or M2 with the S55! My car has stock downpipes and stock competition (ZCP) muffler. In addition to the sound, the car feels quicker off the line and low/mid range due to quicker turbo spool. Shoutout to Justin over at AutoTalent for the hookup.

Follow me on Instagram : RedlineFanatix