Flowmaster · New
Flowmaster 05-09 Ford Mustang V6 American Thunder Axle-Back Exhaust System
MPN 17421 · Store SKU flo17421
Supplier stock checked 11/8/2026, 11:12:34 AM UTC. Adding a part does not reserve it.
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Product details
This American Thunder axle-back exhaust system is constructed from 16-gauge mandrel-bent aluminized steel and includes a pair of specially designed 60 Series™ performance muffler with the sound that goes hand in hand with the performance image of the Mustang. The muffler is finished off with large 4.00-inch polished stainless steel tips to fill out the exhaust cutouts in the rear valance for a muscular appearance that matches the sound. As an American Thunder® system, it delivers a moderate interior tone and exterior sound that is suited to the enthusiast who wants their performance to be heard. Like all Flowmaster® exhaust systems, the benefits include improved throttle response, power and mileage. Designed for an easy fit, the system includes all necessary parts and hardware for easy installation. Note: Fits both coupes and convertibles. 2005-2009 Ford Mustang with V6 engine. Fits coupe and convertibles. - Moderate sound Flowmaster American Thunder Axle-back Exhaust System
Manufacturer fitment & guides
Check 17421 against the manufacturer’s application information below.
Part-specific notes
- California Proposition 65: Y
