The classic sound of a Flowmaster® chambered exhaust, our American Thunder® Series features mufflers tuned to deliver more power, torque, throttle response and mileage. Best of all, these …

Flowmaster American Thunder exhaust systems are designed with the latest exhaust technology available--resulting in improved acceleration, passing power, and fuel mileage. A key to these …

Nov 28, 2025 · Flowmaster American Thunder Exhaust Systems for Truck/SUVs are ideal for the one looking for a moderate-to-aggressive exhaust tone, inside and out. The mufflers are tuned to deliver …

American Thunder systems deliver a moderate to aggressive exterior tone with a mild-moderate interior tone and are suited to the enthusiast who wants their performance to be heard. Like all Flowmaster …

Feb 28, 2023 · The exhaust sound of the American Thunder system has become a symbol of American power that is recognized all over the world. American Thunder is the most popular of the Flowmaster …

Mar 27, 2024 · If you’re craving that powerful pit bull exhaust note, look no further than the Flowmaster American Thunder system. It gave my car the aggressive sound and performance upgrade I was …

The classic sound of a Flowmaster® chambered exhaust, our American Thunder® Series features mufflers tuned to deliver more power, torque, throttle response and mileage.

Shop Flowmaster exhausts by series—American Thunder, Force II, Flow FX, Outlaw, and Signature Series. Find the perfect sound and performance for your ride, from aggressive to mild tones.

Flowmaster Stainless Steel American Thunder exhaust systems have been designed with the latest exhaust technology available. Through this technology, you will experience improvements in …

The American Thunder boasts mandrel-bent pipes, chambered mufflers, and custom-engineered designs to achieve huge power gains while tuning in an aggressive, classic exhaust tone. Choose …