Flowmaster 817494 Cat-back Exhaust System for 05-10 Mustang with 4.6L/5.4L

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.