Diaboliko

Good morning, friends. From now wish you all a great year 2013. He liked to help me in a matter of one exhaust from my mk2 focus, I wanted to put in my double back box equal from the focus st or the focus rs.aI loved the back box from the focus rs and st but could you tell me if I can put in my focus diesel back one of these boxes? the main idea is to get out the silencer and put back box. Thanks