[520SC]

The Street Beasts version of slip fit headers/side pipes uses brackets to hold the side pipes tightly to the headers. The brackets are joined together with a small bolt. If the bolt backs out, then the side pipes can begin to fall away from the headers. They won't separate completely, though, because the side pipe supports won't allow them to move that far downward. However, they'll sag to the point where it's noticeable from the side of the car. Have you checked to verify that the side pipes are not starting to separate from the header pipes?