If it's true dual then going with something like pypes will deffinitely make it louder. Like guitarstar said upping the pipe diameter will help, although I wouldn't go bigger than 2.25, and bigger longer exhaust tips will make the sound a lot deeper.
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Newest mod, a Zex smart system with purge valve jetted for 75hp, DiabloSport Predater tuner, custom dual 2" w/ magnaflows and lacking the cats, BBK fenderwell CAI
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