http://www.youtube.com/watch?v=FzYle6U8cCM

This guy has a real nice exhaust on his grand prix. I really like it when you rev the engine and let off and you get that backfire noise. Is that a good thing? Any he says he has a magnaflow cat with flowmaster 40 mufflers, will just that setup give me that noise or do you guys think he has something else to make it like that?

Any suggestions on how to make it like that would be great