Flowmaster American Thunder SS Cat-Back For Chevy Silverado/GMC Sierra (99-07) (817428)

The Flowmaster American Thunder SS Cat-Back Exhaust System is a high-performance exhaust upgrade designed for 1999 to 2007 GM C/K 1500 Extended Cab and Short Bed trucks equipped with 4.3L, 4.8L, or 5.3L engines. Constructed from heavy 16-gauge mandrel-bent stainless steel tubing, this system offers durability and maximum flow for improved performance. It features a stainless steel Super 40 Series performance muffler that delivers a deep, aggressive exterior sound combined with a moderate interior tone, ensuring a powerful yet comfortable driving experience. The dual 2.50-inch tailpipes provide a clean, dual look and can be configured to exit straight out the back or behind the rear wheels, making it suitable for towing or street use. The system is finished with polished 304 stainless steel tips embossed with the Flowmaster logo, combining style with functionality. All necessary hardware and instructions are included for straightforward installation.

Designed specifically for 1999–2007 GM C/K 1500 trucks with the specified engines, this exhaust system is a direct bolt-on upgrade that enhances both sound and performance. It is ideal for street enthusiasts seeking a bold exhaust note and improved exhaust flow, whether for daily driving or performance tuning. The kit includes all components needed for a hassle-free installation, making it suitable for DIY enthusiasts. This system is engineered to fit seamlessly with the factory setup, providing a durable, high-quality upgrade that elevates the truck’s sound and performance profile.