What type of rear bumper do you have? When I put my Stromung on, I found that the tip was hanging kind of low. I bought Mini S hangers and the tip now fits snug against the bumper.
Post 26 at this thread has the part numbers and a picture showing the difference between the stock ti hanger and the Mini S...
http://www.318ti.org/forum/showthrea...xhaust+hangers Enjoy the growl of your new Stromung....