The easiest modification for your 2005 Mustang, 2006 Mustang, 2007 Mustang, 2008 Mustang, 2009 Mustang 2010 Mustang, 2011 Mustang, 2012 Mustang, 2013 Mustang , 2014 Mustang or Shelby GT500 Cobra is an axle back exhaust kit. Similar to a cat-back exhaust kit. Mustang Axle-back kits include mufflers and tailpipes and fit 5.4L supercharged Shelby GT-500,4.6 GT or 3.7L 4.0L V6 Mustangs. Brands like Ford Racing, Pypes, Magnaflow, Flowmaster, Bassani, JBA, Hooker and Mac Performance, with most manufactured from stainless steel. Get a louder exhaust for your Mustang.