Flowmaster's new Resonator-Delete kit for the 2015 Ford Mustang with the 2.3L EcoBoost engine is a great way to increase the sound level of your car. These Y-pipe assemblies use Flowmaster's patented D-port technology and can be used with the factory rear muffler sections or with Flowmaster's Axle-back kits. The pipe kits are constructed with 2.25" 409S mandrel bent tubing. The pipe system is manufactured in the USA and is covered by Flowmaster's Lifetime Limited Warranty. Note: Fits fastback and convertible Mustangs. Product Benefits Stainless Steel Construction Dyno Tuned For Maximum Performance Mandrel Bent Tubing Limited Lifetime Warranty Made in the USA