Anthoney...Hello... In my opinion, I would change to the correct dual system as soon as possible (time, money & parts being available). The Imperial will just 'run' better! Be sure to do your research and get the correct sizes, and mufflers, and all the correct 'bends', so that you have a sound & rattle free system... Just my opinion. George ... 'with the soon to be beautiful '55/'56 Limo's' avlimited <anthony@xxxxxxxxxxxxx> wrote: >I have a question. My 56 Imperial has single exhaust. I know it came with >dual but the previous owner had it switched to single. Would it be better >to change it back to dual exhaust? > > >