Well, you must have loose heat shields. I couldnt even move any portion of my exhaust after installing these, thats how tight things are with these on.. Mine was also rattling alot because you cant use the 3rd hanger on a Stromung on a 02 RS, and the stock hangers gave up the job.. The only tough part was taking the Kartboy hanger off of the cars right exhaust hanger to put it on the the Stromungs hanger first, it wouldnt let me do it the other way around.. And tightening the left hanger bolt with the exhaust in place was a biotch too..