This product is for Racing Competition only and is not legal for use in highway or street vehicles or other non-racing competition off-road vehicles.
Purchasing this product requires you to sign our Vehicle Compliance Waiver here.
For the person who is looking for a complete Catback 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.
WARNING: Cancer and Reproductive Harm
|Mustang||GT||1999-2004||8 Cylinder 4.6 Liter||
|Mustang||GT Bullitt||2001||8 Cylinder 4.6 Liter||
|Mustang||Mach 1||2003-2004||8 Cylinder 4.6 Liter||
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