I have dual exhaust on my prelude for my Black Widow bumper, and it looks awesome. gained horseys, too. My exhaust system consists of Airmass headers, new 2 1/4" cat, 2 1/4" piping back to a Y-pipe which splits into 2 2" pipes going to 2 Tenzo touring mufflers. sounds awesome, too. I also have a friend that got a full Hayame catback exhaust, and molded the left exhaust hole shut. This also looks very good. Your choice. about the same price, depending on what body shop you go to to mold your bumper.