[spielnicht]

While I love my Dinan exhaust, I hate the back pressure noise it produces while in Sport mode. Honestly, this is the main reason I didn't keep the M5 mufflers on my 550i (it was way more pronounced though). This is definitely a scavenging issue created by aftermarket mufflers (or mufflers not made specifically for the car).

Does anyone have any experience in how to reduce or eliminate the noise? I've read replacing the center resonators with an x-pipe could eliminate this, but I need to be sure before considering the cost.