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 systems deliver a moderate to aggressive interior and exterior tone and are suited to the enthusiast who wants their performance 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.Features: Mandrel Bent Tubing Limited Lifetime Warranty Aggressive Exterior Exhaust Tone Includes Hangers and Hardware For Easy Installation Cat Back System Dual Out Rear Exit Dyno Tuned for Maximum PerformanceProduct Description: '99-'04 Ford Mustang GT, MACH1/Bullitt, (Not Cobra), 4.6L SOHC, 2.50" Mandrel Bent Tubing, Super 40 Series Mufflers, 3.00" Polished Tips, American Thunder, DOR, 409S Stainless SteelPit Stop USA offers Flowmaster American Thunder Dual Exhaust System - 1999-2004 Ford Mustang GT, Mach1 and Bullitt (not Cobra) 4.6L SOHC 817312 at low everyday prices. Be sure to check out all our products from Flowmaster including Flowmaster Ford Mustang (4th Gen) Exhaust Systems and Flowmaster Ford Mustang Exhaust Systems.