Flowmaster

817390

Flowmaster 817390 American Thunder 409S Dual Rear Exit Moderate/Aggressive Sound Header-Back Exhaust System

EAN: 0700042027385

UPC: 700042027385

Exhaust & Emissions

Stainless steel construction
Dyno tuned for maximum performance
Patented Delta Flow technology
Lifetime limited warranty
Made in the USA

For the person who is looking for a complete Header-Back dual exhaust system with a performance sound. This system is mandrel bent for maximum performance and includes specially selected mufflers. American Thunder 2.5 inch systems generally deliver a moderate to aggressive interior and exterior tone and are suited to the enthusiast who wants their performance to be heard. The sound level will depend greatly on the engine and level of modification. 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.

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