American Thunder Kit Cat back, Exhaust, Kit, Chevrolet, GMC, Truck, Performance Cat-back 409S 99-06 GM 1500 Cat-back System 409S - Dual Rear/Side Exit - American Thunder - Moderate Sound Cat-back System 409S - Dual Rear/Side Exit - American Thunder - Moderate Sound - 1999 to 2006 GM Silverado and Sierra truck Exhaust System Kit Fits 1999 to 2006 GM Silverado and Sierra truck on a 1/2 Ton chassis with a 4.8L or 5.3L engine using a single flanged catalytic converter, fits 2 and 4 wheel drive models with Extended Cab and short bed only. For the person who is looking for a complete Cat-back dual exhaust system with a moderate sound level. With easy fit in mind, these systems are mandrel bent for maximum performance and include specially selected mufflers. This America Thunder system delivers a moderate interior and exterior tone and is suited to the enthusiast who wants to hear the rumble of their truck. 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. With Single Flanged Catalytic Converter. Extended cab/Short bed only.
