Originally Posted by RambleJ
On the 535 the only difference is the black tips.
Now the m performance exhaust is different but that's an aftermarket upgrade that has to be purchased seperately and does not come with the m sport package.
Unfortunately, the M Performance exhaust does not exist for 550i, and some people claim that the m sport exhaust does sound differently than normal version on the 550i/650i......... So just thought that I should ask