Flowmaster® (15-21) Mustang American Thunder™ 304SS Dual Exhaust System

  • Sale
  • Regular price $592.95

Compatible: (Please Choose Correct Model From Product Options)

2015 - 2021 Ford Mustang 


This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.



American Thunder Exhaust

The Sound That Started it All

American Thunder® is the ‘original’ Flowmaster sound. In most cases a very aggressive sound level, American Thunder systems use various chambered mufflers to achieve the performance gains and aggressive sound that you want from your car or truck, inside and out. Available in stainless steel or economical aluminized steel, American Thunder systems are a great choice when you want to be heard.


  • Aggressive Sound Exhaust Tone
  • Mandrel Bent 16 Gauge Tubing
  • Axle-Back, Cat-Back, or Header-Back Systems
  • Includes Hangers and Hardware for Easy Installation
  • Dyno Tuned for Maximum Performance



Install Guide: