Description
Overview
The Flowmaster Flow FX Cat-back Exhaust System is a complete performance upgrade engineered for the 2019-2026 GM Silverado/Sierra 1500 equipped with the 5.3L engine. Built to fit both 2- and 4-Wheel drive models with 148 or 157-inch wheelbases, this system delivers the deeper, more aggressive sound and improved performance that truck owners want, without sacrificing everyday drivability. Every component is manufactured from durable 409S stainless steel, so your Silverado or Sierra is protected against corrosion for years of trouble-free service.
At the heart of the system is the Flow FX “straight-through” muffler, a design that maximizes flow for both great sound and strong performance. A 3.00-inch inlet pipe feeds directly into the muffler, and Flowmaster backs the setup with maximum dyno gains of 10 hp and 12 lb.-ft. of torque at the rear wheels. The result is a moderate, purposeful exhaust note that means business under throttle while staying comfortable during long highway drives.
Key Benefits
The 3.00-inch mandrel-bent tailpipe routes cleanly and exits behind the rear passenger-side tire, finished with a large 4.50-inch diameter black ceramic coated 304S stainless steel tip. The embossed tip logo and blacked-out finish give your truck a custom look that pairs perfectly with the deep performance sound of the Flow FX muffler. It’s a straightforward way to transform both the attitude and the appearance of your Silverado or Sierra.
- Fits 2019-2026 GM Silverado/Sierra 1500 with the 5.3L engine (2WD and 4WD, 148″ or 157″ wheelbase)
- 409S stainless steel construction for long-lasting, corrosion-resistant service
- Flow FX “straight-through” muffler for a moderate, deep performance tone
- Maximum dyno gains of 10 hp and 12 lb.-ft. of torque at the rear wheels
- 3.00-inch inlet and mandrel-bent tailpipe exiting behind the rear passenger tire
- 4.50-inch black ceramic coated 304S stainless steel tip with embossed logo
- CARB (California) compliant, Emission Code 5
Easy At-Home Installation
Designed to make upgrading simple, the Flow FX system uses all the factory hanger locations and connections for a bolt-on fit. It includes detailed instructions and all necessary hardware, so many owners can complete the installation at home with basic tools. There’s no need to modify factory mounting points, making this a clean, direct upgrade over the stock exhaust.
Fitment & Compliance
Confirm your model year, engine, and wheelbase before ordering to ensure a proper fit. This single tailpipe cat-back system is CARB compliant and carries an Emission Code of 5, making it a smart choice for owners who want proven Flowmaster performance and sound. Note: California Proposition 65 Warning applies.
