It turned out that one of the poles that holds the exhaust in place was hitting against the right rear towing hitch. So I removed the the triangular hitch and presto! no more annoying noise. Has anyone else had this problem? I still feel that the exhaust moves back and forth way to much and makes the exhaust look cheesy whhen driving (moves about two inches in each direction left right). This is due to the flex in the rubber hangers, which you can't do to much about. Getting shorter rubber hangers would cause the tip to touch the bottom of the bumper. Any suggestions on getting rid of some of the extra movement now that the noise is gone. I don't want my car to llok stupid with an exhaust bouncing all over the place.