KimikoPi — I believe that the metal heat-shield is attached to the body of the car above the muffler, and not to the muffler itself. The muffler gets very hot, and nothing should be wrapped around it or touching it. Your earlier posts suggest that you're talking about some kind of thermal wrapping around the muffler itself. There should be none. I suggest that you go to a Toyota dealer, lie down, and have a look at the muffler area of a TCH to see for yourself what it should look like.

Stan