farmerwrx

i noticed yesterday that my exhaust was blowing so i checked it out to day and part of the exhaust is gone and sorry to be thick i have no idea what it's called or what my options are,all i know i have changed the back box and then the piece next to that and its not them its the next piece to that by the gearbox there's a shield bolted to it that's gone any help much appreciated on my options for a replacement etc car is a 1999 type r version 5