Flowmaster American Thunder Cat-Back Exhaust System - 3 in Diameter - Single Side Exit - GM Fullsize Truck 1996-99 Proform Parts GM Fullsize Truck 1971-87

GM Fullsize Truck 1971-87

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Flowmaster American Thunder Cat-Back Exhaust System - 3 in Diameter - Single Side Exit - GM Fullsize Truck 1996-99 Proform Parts GM Fullsize Truck 1971-87For the person who wants a subtle custom appearance with all the benefits that a Flowmaster Cat back exhaust system provides. S. O. S. (Single out side) systems are the perfect choice. American Thunder systems delivers 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