For the serious enthusiast who is looking for all the performance benefits of a complete Cat-back dual exhaust system, this is it. As an American Thunder system, it delivers an aggressive exterior sound level and a moderate interior tone that is suited to the enthusiast who wants to be heard. With maximum performance and easy fit in mind, the system is mandrel bent and includes specially engineered mufflers featuring Delta Flow technology. A Scavenger Series X-pipe is used to maximize exhaust pulse velocity for better torque and helps keep that classic muscle car tone. Maximum increases of 17 hp and 19 ft-lb. torque at the rear wheels. 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 a simple installation.. Fits 2005-2010 Ford Mustang GT, GT500, California Special or convertible with 4.6L or 5.4L engine. 3.00-inch mandrel bent pipes with Scavenger Series X-pipe. - Aggressive sound. Fits 2005-2010 Ford Mustang GT, GT500, California Special or convertible with 4.6L or 5.4L engine.. Flowmaster 05-10 Mustang 3in. American Thunder SS Cat-Back Exhaust System. 3.00-inch Mandrel-bent 16-gauge Stainless Steel Tubing. Includes Hangers and Hardware for an Easy Installation. Flowmaster American Thunder Cat-back Exhaust System. Scavenger Series X-pipe Crossover for Maximum Power. Specially Designed 60 Series Performance Mufflers. Large 4.00-inch Polished Stainless Steel Tips. Connects After Factory Catalytic Converter. Aggressive Sound Exterior Exhaust Tone. Uses the Factory Hanger Locations. 0510 MUSTANG 3 CATBACK AMT 409S. SYS 05-10 MUSTANG 3". SYS 05-10 MU

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