Flowmaster's American Thunder® Axle-back exhaust system for the 2015-2017 Ford Mustang is perfect for the person looking for a moderately aggressive sound level outside of the car, while maintaining a mild sound level inside, with all of the performance benefits that you would expect from Flowmaster. This bolt-on DOR (Dual Out Rear) emissions-legal system for cars with the 2.3L EcoBoost or 3.7L V6 engine features 3.00in inlet pipes that flow into a pair of Super 10™ series mufflers for maximum performance. The system is built out of 409S stainless steel and utilizes 4.00in polished Stainless Steel Flowmaster® embossed tips. The exhaust system is manufactured in the USA and is covered by Flowmaster's Lifetime Limited Warranty. Designed for an easy fit, this system includes all necessary parts and hardware for installation. Note: This system fits hardtops and convertibles.