A universal muffler is just that, a muffler that can fit any car because it doesn't have any hangers or flanges attached. A bolt-on catback includes a length of piping (from the cat to the back...) a muffler and hangers. The benefit to a catback is that you don't need to fab anything, pull the old one off, slap the new one on. Which makes better power? Depends on the quality of it. A universal muffler with custom piping can make more HP than a bolt-on catback, and vice-versa.
And I'd lose this from your sig, its in violation of the rules, and its not too bright.
Quote:
RACING WITH A/T'S IS LIKE WINNING THE SPECIAL OLYMPICS, EVEN IF YOU WIN, YOURE STILL RETARDED
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....custom intake mount.....homemade dampening....."i am..... 'THE STREET MODDER'......"
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