Sound Insulators and Shields
WARNING: This page is about a different car, the 2014 Lincoln MKX and 2014 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
Sound insulators and shields, attached to the underbody, protect the vehicle from exhaust system heat and should be inspected at regular intervals to make sure they are not dented or out of position. Replace a sound insulator and shield if it is damaged or shows signs of deterioration. The sound insulators and shields for the muffler, muffler pipe, resonator and catalytic converter pipe are installed separately.