he removed the heat shield to make a little more room for the muffler, which was already rubbing on it. to be honest i dont think this guy 100% knew what he was doing... the tips are not even and he didnt use the test-type pipe that came with the setup.(used his own pipe)
im kind of planning to go to a different exhaust shop and see how much it'll cost me to get it fixed.
as long as the muffler 'tapping' the edge of its indentation isnt damaging it, im not worried.