The Flowmaster® American Thunder® Axle-back exhaust system for the 2011-2012 Ford Mustang GT is perfect for the person looking for an aggressive sound level outside the car with a moderate sound inside of the car at different rpm's. This bolt-on emissions-legal system is for cars with the 5.0L engine and features 3.00-inch mandrel-bent tubing flowing into a pair of Super 44™ Series performance mufflers with 3.00-inch tailpipes for maximum performance and a deep powerful sound. The system is constructed from 409 stainless steel and features large 4.00-inch polished stainless steel tips for a refined look. The system is covered by our Flowmaster Lifetime Limited Warranty and is designed for an easy fit and includes all necessary parts and hardware for installation. Note: This system fits coupes and convertibles. Note: Also fits 2012 Ford Mustang Boss 302.