my brother has a 98 Cobra which has had a couple different exhaust systems on it, but he is giving me a Flowmaster cat-back for free for my 2004 GT. not knowing half as much as i would like to about my Mustang yet, will this set up bolt directly on to the factory set up? the Flowmaster system also comes with an X-pipe, but it has no cats. is there any way i can put cats on that X pipe and still have it fit correctly or did the X pipe need to come with the cats already on it? any help would be appreciated, thanks.
joe
joe