Gruppe M installed... not sure if I like it...
I was expecting a different sound out of this thing... It has a clear intake sound... but its more like honda civic intake sound, if you know what I mean. I hear lots of air sucking, and a little more turbo noise, but thats it.
Maybe it needs to adjust or something? we'll see, but it could be for sale soon!
2013 X5 M
2008 Cessna 400