Redstang93 Posted May 16, 2012 Report Share Posted May 16, 2012 What about a 3" flowmaster catback? Link to comment Share on other sites More sharing options...
vapor08GT500 Posted May 16, 2012 Report Share Posted May 16, 2012 Have taken them off GT500's. They cackle too much... Check out this thread with sound clips... http://www.teamshelby.com/forums/index.php/topic/60512-the-mms-muffler-sound-clip-thread/ Alex Link to comment Share on other sites More sharing options...
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