Flowmaster’s new Resonator-Delete kit for the 2015-2017 Ford Mustang Base Model with the 3.7L V6 engine is a great way to increase the sound level of your car. These X-pipe assemblies can be used with the factory rear muffler sections or with Flowmaster’s Axle-back kits. The pipe kits are constructed with 2.25in 409S mandrel bent tubing. The pipe system is covered by Flowmaster’s Lifetime Limited Warranty.