just save your pennies and go to a muffler shop and have them bend you a custom one peice catback, have them weld your current muffler on and enjoy.
SInce i am theonly one here that is actually going to answer your question. Is the resonator acces. from one of the open ends? If so just get a long extension and take a big hammer and go to town on it. The pieces will start fall out like theres no tomorrow. If its not acces. from a straight opening you can just cut out the resonator and put in a straight peice from adavanced or something with a couple of clamps for about $20 or so.. hope that helps.
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