Originally Posted by RPiM5
Thanks for the info. Is it true that only certain dealers are authorized to sell BMW M Performance parts?
In some countries but not in the US. In the US we never really got an M Certified Service department model going, so any dealer can sell M performance products.
But that said I am pretty sure that your friend's friend doesn't have an M Performance exhaust or tune, but has the Boysen exhaust, high flow cats and prototype gray market BMW tune per my previous post.