Upgrade your 2011-2012 Ford Mustang GT with the Flowmaster Force II Axle-Back Exhaust System, part number 817503. This high-quality stainless steel system is engineered for bolt-on performance: mandrel-bent piping and a precision-welded muffler offer improved flow and a deep, refined tone thatÂ’s louder than stock without being intrusive. Its dual-rear exit design provides a muscular look and aggressive exhaust note that complements the V8 engine while maintaining daily-drivable comfort. Installation is straightforward using the factory hangers and included hardware, so you can get the enhanced sound and performance without major modifications.