Even though a Mustang 5.0L cat-back exhaust system is a bit more expensive than a comparable Mustang 5.0L axle-back kit, cat-backs provide a slightly deeper tone and much more noticeable horsepower, torque, and fuel mileage gains for your 2011 to 2014 Mustang GT. Mustang GT cat-back exhaust kits replace your Pony's entire exhaust system after your catalytic converters, including your Pony's exhaust tips, mufflers, and kickover tubes. We carry only the top names in the performance exhaust industry including Borla, Magnaflow, Flowmaster, JBA Exhaust, Bassani, and more. Each of these Mustang 5.0L cat-back systems use improved tubing and high-flow muffler designs for a head-turning new sound. Our Mustang cat-back exhaust kits are all bolt-on replacements for your stock system and are very easy to install. Once you have a new cat-back kit, take a look at our Long Tube Headers and Mid-Pipes or our Mustang Handheld Tuners and Monitors.