Ordered the M Performance rear diffuser and M Perfomance Exhaust system and installed at the dealer.
They placed the old exhaust in the back
First cold start at the dealer and there was lots of popping but when driving I don't hear any popping noise in sport mode. When I left off the gas and come to a slow stop there is like faint rattling sound coming from the exhaust.
Maybe after I put more miles on the exhaust? Upon first inspection I noticed that the right exhaust tip stuck out more than the left side so I had two tech readjust it. Now it sits perfectly.
So far I love everything about the exhaust sound. My X5 sounds so exotic lol. I'm happy that the passenger side is always opened too.