The 2009 Mustang already comes with dual exhaust. They have an h-pipe not an x-pipe. Is it stock now? To change it to duals, you would be looking around 480.00
It's stock now, mines a single out the back not dual, after it comes from the headers on both side lol it combined to a single pipe out the back I just wanted to cut it there and run two pipes maybe flow masters, but I just wanted a guess around what price
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