Flowmaster's AmericanThunder Axle-back exhaustsystem for the 2015-2017 FordMustang is perfect for theperson looking for amoderately aggressive soundlevel outside of the car,while maintaining a mild soundlevel inside, with all of theperformance benefits that youwould expect from Flowmaster.This bolt-on DOR (Dual OutRear) emissions-legal systemfor cars with the 2.3LEcoBoost or 3.7L V6 enginefeatures 3.00in inlet pipesthat flow into a pair of Super10 series mufflers for maximumperformance. The system isbuilt out of 409S stainlesssteel and utilizes 4.00inpolished Stainless SteelFlowmaster embossed tips. Theexhaust system is manufacturedin the USA and is covered byFlowmaster's Lifetime LimitedWarranty. Designed for an easyfit, this system includes allnecessary parts and hardwarefor installation. Note: Thissystem fits hardtops andconvertibles.