Fitment Note* 5.7L engine, including AWD models See Fitment Below!
For the person who is looking for a complete Cat-back dual exhaust system with an aggressive tone. With easy fit in mind, these systems are mandrel bent for maximum performance and include specially selected mufflers. American Thunder systems deliver a moderate to aggressive interior and exterior 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.
✓ Mandrel bent 16 gauge stainless steel tubing ✓ Aggressive Sound Exterior Exhaust Tone ✓ Includes hangers and hardware for easy installation ✓ Dyno tuned for maximum performance
Tip Diameter (in)
Dual Rear Exit
Inlet Diameter (in)
Flowmaster® 817480 Cat-back System 409S - Dual Rear Exit - American Thunder® - Aggressive Sound