So I always liked the x5m bumper and quad muffler outlets but i never liked the s63 exhaust sound, so i wanted to have a hybrid look and sound: sound of n63 with the look of the x5m. And knowing that i have the m package the rear wheel fenders would match up perfectly with the x5m rear bumper. Then all i need to do is lightly modify the exhaust to work. I made a video of how to add the x5m bumper and x5m megan racing exhaust (obviously, this would work for any x5m muffler). I certainly had fun with it, hope you enjoy!