another problem i just though about with my fusion rear when it goes on, is the heat of the exhaust! at the mo i just have the standard mk1 rear bumper on, and my exhaust has melted a tiny bit of the bumper thats rests on top it. big concern for the fusion rear mouth, as its 4 inches big, and the backbox tip is 4 inches. although it melted my normal bumper, would it do this to the fiberglass fusion? help me please people.