The first and only Cat Back "Super System" for 2011-14 Mustangs. The Pypes Exhaust Design Crew noticed that axlebacks don't do a lot for the 2011-14 Coyote Mustangs. So a complete Cat-back Performance Exhaust seemed to be in order. After extensive designing and testing we've developed an exhaust system that ramps up the performance and cranks up the sound for these new Mustangs. All pipes are stainless steel, mandrel bent and with a 3" diameter, for an extreme improvement in sound and performance over the stock exhaust. We're not the first out with a system, but if you want something that really gains HP and sounds great, you won't be disappointed.