This Flowmaster® no resonator kit is designed specifically for 2015-2017 Ford Mustangs with the 3.7L engine and is a great way to increase the power and sound level of your Pony. The system is constructed with dual 2.25-inch stainless steel mandrel-bent tubing and includes our Scavenger Series® X-pipe chamber for a deep unique tone and maximum power. The system can be used with the factory rear muffler section, or with one of our axle-back exhaust systems and is covered by our Lifetime Limited Warranty.