Flowmaster's American Thunder Cat-back exhaust system for the 2015 Ford Mustang is perfect for the person looking for an aggressive exterior sound level while maintaining a moderate interior sound with all of the performance benefits that you would expect from Flowmaster. This bolt on 409S stainless steel system for the 2.3L EcoBoost engine features 2.50" mandrel bent tubing that splits into dual 2.25" tailpipes for maximum performance and then runs into Outlaw Series mufflers. The system is finished off with dual 4.00" stainless steel tips that exit within the rear bumper valence. 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 only, not convertibles.