Pypes Exhaust SFM79MS 2011-2014 Mustang V6 Pype Bomb Axle Back System Fits 2011-2014 Mustang V6 3.7L 4" diameter resonated stainless tips Polished 304 stainless steel construction 16-gauge, mandrel-bent pipes Features redesigned M-80 pipes to add aggressive sound to your V6