With thirty-five years of experience, Flowmaster has specialized in automotive science and various patent protecting technologies. Ushering a new standard, the brand has shown a revolutionary development in the past few decades. The brand has an aim to design the best automotive products, delivering high-end performance. The highest quality of exhaust products, advanced manufacturing techniques and unwavering dedication toward customers are what set this brand apart from others. Flowmaster Performance has embraced innovative technologies to improve its product line. From its FlowFx straight-through design to legendry chambered, every product delivers outstanding performance.
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.
- Stainless Steel Construction.
- Dyno proven performance gains.
- Full 3.5 in. mandrel bent system.
- Lifetime limited warranty.
Cat-back System 409S - Single Side Exit - American Thunder - Moderate/Aggressive.
Fits 2010 to 2014 Ford F-150 and SVT Raptor with a 6.2L V8 engine, fits Extra Cab and Crew Cab with 5.5 foot bed. Fits 133 inch and 145 inch wheelbases Professional installation by a licensed mechanic required.
Fitment & Application:
|Shipping Method||UPS/FedEx/USPS Ground|
|Availability||Possibly special-order. Call or email to check stock.|
|California Prop 65 Warning||
This product can expose you to chemicals including lead and chromium (hexavalent compounds) which are known to the State of California to cause cancer and birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov