Flowmaster Exhaust 1999-2004 Mustang GT, Mach 1, & Bullitt - Cat-back Echaust System - Dual Rear Exit - American Thunder - Moderate Sound Flowmaster Cat-back System - Dual Rear Exit - American Thunder - Moderate Sound For the person who is looking for a complete cat-back dual exhaust system with an aggressive tone. With easy fit in mind, these systems are mandrel bent for maximum performance and include specially selected mufflers. American Thunder? These systems deliver a moderate to aggressive interior and exterior tone and are suited to the enthusiast who wants their perfomance to be heard. Like all Flowmaster systems, the benefits include improved throttle response, power and mileage. Designed for an easy fit, these systems include all necessary parts and hardware for easy installation. Material: Aluminized Steel Inlet: 2.50 in. Outlet: 2.50 in. Shipping Weight: 60 lbs Warranty: Standard Flowmaster 3 year