Flowmaster's American Thunder Axle-back exhaust system for the 2015-2023 Ford Mustang with the 2.3L Ecoboost and 3.7L engines is perfect for the person looking for a moderately aggressive sound level outside of the car while maintaining a mild sound level inside. This bolt-on emissions-legal system for cars features 3.00-inch mandrel-bent inlet pipes flowing into a pair of Super 10 Series mufflers for maximum performance. The system is constructed out of 409S stainless steel for durability, is finished off with large 4.00-inch polished stainless steel tips and is covered by our Lifetime Limited Warranty. Designed for an easy fit, this system includes all necessary parts and hardware for installation. Note: The sound level of this system is quieted by the factory resonators. Check out our No Resonator X-Pipe and Y-Pipe kits #81107 and #81108, if you desire more sound from your Ecoboost or 3.7L engine.. Fits 2015-2023 Ford Mustang with 2.3L Ecoboost and 3.7L engines. Fits Coupes and Convertibles. - Aggressive to moderate sound. Fits 2015-2023 Ford Mustang with 2.3L Ecoboost and 3.7L engines. Fits Coupes and Convertibles.. Flowmaster 15-23 Mustang BASE 2.3L/3.7L American Thunder SS Axle-Back Exhaust System. Flowmaster American Thunder Axle-back Exhaust System. Large 4.00-inch Polished Stainless Steel Tips. 16-gauge Mandrel-bent 3.00-inch Tubing. 1523 MUSTANG BASE 23L37L AB AMT 409S. Super 10 Series Performance Mufflers. Dyno Tuned For Maximum Performance. Uses the Factory Hanger Locations. Stainless Steel Construction. Lifetime Limited Warranty. SYS 15-23 MUSTANG BA. Flowmaster Quality. SYS 15-23 MU

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