Description
Overview
The Flowmaster Outlaw Cat-back Exhaust System is built for the driver who wants their 5.3L GM truck to sound as strong as it looks. Engineered specifically for 2009-2013 Chevrolet Silverado 1500 and GMC Sierra 1500 trucks with the 5.3L engine, this bolt-on system pairs the aggressive character of the Outlaw series with the deep, purposeful tone of a Super 10 Series muffler. If you’re after an aggressive sound level both inside and outside the cab, this is the setup that delivers.
At the heart of the system is 3.00-inch mandrel-bent stainless steel tubing that flows into an included Super 10 Series muffler. Mandrel bending keeps the pipe diameter consistent through every turn, promoting smooth, unrestricted flow, while the stainless construction stands up to the heat and elements that come with everyday driving and towing.
Choose Your Exit
The large 3.00-inch mandrel-bent stainless steel tailpipes can be configured with your choice of exit locations. Route the pipes straight out the back under the bumper for a muscular, purposeful stance, or send them out behind the rear tires on each side of the truck. The side-exit configuration is the ideal choice when towing a boat or RV, keeping exhaust clear of your trailer. Whichever route you choose, dual tailpipes finish the look and the sound.
Finishing Details
Each tailpipe is capped with a large 4.00-inch black ceramic-coated dual-wall stainless steel tip, complete with an embossed logo for a clean, factory-plus appearance. The silver mandrel-bent piping, flanged connections, and blacked-out tips give the whole system a finished, premium presentation from front to back.
- Fits 2009-2013 GM Silverado 1500 / Sierra 1500 trucks with the 5.3L engine
- 3.00-inch mandrel-bent stainless steel tubing for smooth flow
- Included Super 10 Series muffler for a deep, powerful, aggressive tone
- Dual 3.00-inch stainless tailpipes with rear or side exit options
- Large 4.00-inch black ceramic-coated dual-wall stainless tips with embossed logo
- Flanged mount type with all necessary parts and hardware included
- CARB (California) compliant, emissions-legal bolt-on design
Fitment & Compliance
This system fits all 2/4 wheel drive models with 143.5-inch and 157.5-inch wheelbases. It is a bolt-on, emissions-legal system that is CARB (California) compliant, making it a smart upgrade in emissions-conscious states. Please note this product carries a California Proposition 65 warning, and a heat shield is not included.
Backed by a Lifetime Limited Warranty, the Outlaw cat-back gives your truck a bold new voice with straightforward installation and factory-style fitment. Pick the exit configuration that matches your driving and towing needs, and let your 5.3L breathe.







