For the person who wants a subtle custom appearance with all the benefits that a Flowmaster® Cat-back exhaust system provides, SOS (Single out side) systems are the perfect choice. American Thunder® systems deliver a moderate to aggressive 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.
- Dyno proven performance gains
- Full 3.5 in. mandrel bent stainless tube
- Improved throttle response and mileage
- Fits 133 inch and 145 inch wheelbases
- Made in USA