Description
Overview
The Flowmaster Outlaw Extreme Cat-back Exhaust System is engineered to give your truck the loudest, most aggressive voice in the Flowmaster lineup. Built specifically for the 2014-2019 GM Silverado/Sierra 1500 equipped with the 4.3L or 5.3L engine, this complete cat-back kit swaps out restrictive factory piping for a purpose-built system that delivers the deep, race-proven tone the Outlaw Extreme series is known for. If you want to be heard, this is the setup that gets you noticed.
At the heart of the system is a 3.00-inch race-proven Outlaw muffler paired with 3.00-inch tubing that flows into a single dump-style turndown exit under the bed. The result is an unmistakably deep and aggressive sound both outside and inside the cab. Every component is manufactured from 409 stainless steel for lasting durability against heat and corrosion, and the entire system mounts up using your factory hangers for a clean, no-guesswork fit.
Key Benefits
This is a bolt-on upgrade designed for real-world installation. The kit arrives complete with all necessary hardware and detailed instructions, making it an easy job that can typically be completed in under an hour. Because it uses the factory hanger locations, there’s no cutting or fabrication required to achieve a proper, secure fit.
- Race-proven 3.00-inch Outlaw muffler for the ultimate aggressive sound
- Single 3.00-inch dump-style turndown exit routed under the bed
- Durable 409 stainless steel construction with a silver pipe finish
- Mounts to factory hangers — no modifications needed
- Includes all hardware and detailed instructions for a sub-one-hour install
- CARB (California) compliant with Emission Code 5
Sound & Configuration
The Outlaw Extreme series is the most aggressive tier Flowmaster offers, and this system lives up to the name. Expect a very loud, very deep tone that carries both outside the truck and into the cab. The muffler is included, and the system exits as a single tail pipe. Exhaust tips are sold separately, so you can finish the look exactly the way you want. Choose the setup that matches your build and your sound preference.
Fitment
This system is designed for the 2014-2019 GM Silverado/Sierra 1500 with the 4.3L or 5.3L engine. Note that 2019 fitment applies to the Classic body style. It fits both 2WD and 4WD configurations across the 143.5-inch and 153-inch wheelbases. Please verify your engine, body style, and wheelbase before ordering to ensure the correct application.
Warning: This product carries a California Proposition 65 warning. It is CARB compliant for legal use in California.
