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For the person who is looking for a complete Cat-back dual exhaust system with a moderate to 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 sound level, and are suited to customers looking for efficiency improvements with a sound that will let people know you're coming. 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.
Mandrel bent 16 gauge stainless steel tubing
Moderate Sound exterior exhaust tone
Includes hangers and hardware for easy installation
Dyno tuned for maximum performance
Fits 2004 to 2008 Ford F-150 and Lincoln Mark LT truck with a 4.6L or 5.4L engine, fits 2 and 4 wheel drive models and all wheelbases.
Flowmaster has its roots in solving the engine noise problems encountered by California racers in the 1980s. In 1983 Flowmaster’s founder, Ray Flugger, created his first patented design of racing silencers, which dampened noise with minimal loss of power. Ray attached handles to ease carrying the square shaped race mufflers through the race pits, and the mufflers became known as the "suitcase mufflers." Today, the innovative Flowmaster mufflers are the result of years of development with top race engine builders, thousands of hours of dyno research and "real-world" on-track testing.