Introducing the new FlowFX® Axle-back exhaust system for 2015-2020 Ford Mustangs with a 2.3L Ecoboost, or 3.7L engine. This system is perfect for the person looking for a deep exterior sound while maintaining a moderate interior sound level with all of the performance benefits that you would expect from Flowmaster®. Features include a pair of compact round FlowFX straight-through performance mufflers which have a large 3.00 in. core for maximum performance and a deep sound. The mufflers are constructed from bright 409S stainless steel, utilize the factory hangers and are finished off with large 4.50 in. black ceramic coated stainless steel tips that fill out the factory exhaust cutouts. This system is designed for easy installation, includes all necessary parts, hardware, and detailed instructions. Notes: Fits Coupes and Convertibles.