Description
Overview
The Flowmaster Flow FX Cat-Back Exhaust System is engineered to give your 2009-2013 GM Silverado and Sierra a deeper, more aggressive voice while delivering the free-flowing performance your 4.8L or 5.3L V8 was built for. Manufactured from durable 409S stainless steel, this complete cat-back system is designed for years of trouble-free service, standing up to heat and the elements mile after mile.
At the heart of the system is the Flow FX “straight-through” performance muffler, fed by a 3.00-inch inlet pipe. This straight-through design promotes maximum flow while producing the signature Flowmaster tone — an aggressive yet moderate sound level that’s assertive under throttle without droning on the highway.
Key Benefits
Every detail is built to enhance both looks and performance. The single 3.00-inch mandrel-bent tailpipe keeps exhaust gases moving efficiently and exits out the side, just behind the passenger-side rear tire. It’s capped with a large 4.50-inch diameter black ceramic coated 304S stainless steel tip featuring an embossed logo, giving your truck a custom, finished appearance that pairs perfectly with the deep performance sound of the Flow FX muffler.
- 409S stainless steel construction for long-lasting, trouble-free service
- 3.00-inch inlet pipe into a Flow FX “straight-through” performance muffler
- Single 3.00-inch mandrel-bent tailpipe for smooth, unrestricted flow
- Large 4.50-inch black ceramic coated 304S stainless steel tip with embossed logo
- Side exit behind the passenger-side rear tire for a custom look
- CARB (California) compliant — Emission Code 5
Easy At-Home Installation
This system is designed as a true bolt-on upgrade. It uses all the factory hanger locations and connections, so there’s no cutting and no welding required. Installation instructions and all necessary hardware are included, making it a straightforward project you can tackle right in your own garage. The included muffler and complete tailpipe mean you have everything needed to complete the job.
Fitment
The Flow FX cat-back is built specifically for 2009-2013 GM Silverado and Sierra trucks equipped with the 4.8L or 5.3L engine. It fits both 2- and 4-Wheel Drive models with 143.5-inch and 157.5-inch wheelbases, and its CARB-compliant design makes it a smart choice for emissions-conscious states. Whether you’re chasing a better sound, a cleaner look, or improved airflow, this system delivers on all fronts.
Warning: This product can expose you to chemicals known to the State of California to cause cancer or reproductive harm. For more information, refer to California Proposition 65.
