Flowmaster's new Resonator-Delete kit for the 2018 Ford Mustang GT with the 5.0L V8 engine is a great way to increase the sound level of your car. These Scavenger Series 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 2.50 inch 409S mandrel bent tubing. The pipe system is covered by Flowmaster's Lifetime Limited Warranty.