Description
Overview
The Flowmaster Outlaw Cat-back Exhaust System is engineered for drivers who want their Mustang to sound as serious as it drives. Purpose-built for the 2005-2010 Ford Mustang GT 4.6L and the GT500 with the 5.4L engine, this bolt-on system delivers the deep, aggressive tone Flowmaster’s Outlaw Series is known for, both inside the cabin and out on the street. It fits both coupes and convertibles, so you get the same commanding exhaust note no matter which body style you drive.
At the heart of the system is a pair of race-proven Outlaw Series mufflers fed by 2.50-inch mandrel-bent stainless steel tubing. Mandrel bending keeps the flow path smooth and unrestricted, while the large 3.00-inch muffler outlets are built for maximum performance. The result is an aggressive sound level tuned for enthusiasts who want their presence heard.
Key Benefits
This is a complete cat-back package that leaves nothing to guesswork. It routes into dual tail pipes and finishes with a pair of large 4.00-inch polished stainless steel tips embossed with the Flowmaster logo — a clean, finished look that signals the quality behind it. Because the system uses the factory hanger locations, installation is straightforward and can be done at home with the included hardware and easy-to-follow instructions.
- Fits 2005-2010 Ford Mustang GT 4.6L and GT500 5.4L — coupes and convertibles
- 2.50-inch mandrel-bent stainless steel tubing for smooth, efficient flow
- Dual race-proven Outlaw Series mufflers with 3.00-inch outlets
- Large 4.00-inch polished stainless tips with embossed Flowmaster logo
- Bolt-on design that uses factory hangers for easy at-home installation
- CARB (California) compliant and emissions-legal (Emission Code 5)
What’s Included & Configuration
The kit ships complete with the Outlaw mufflers, mandrel-bent tubing, polished dual tips, and all necessary parts and hardware, along with clear instructions for a confident install. The mufflers are supplied as part of the kit (Muffler Part Number: Kit Only), and while a heat shield is not included, the black-finished piping and polished tips give the system a purposeful, finished appearance. Everything is designed to work together as a matched cat-back package rather than a mix of loose components.
Fitment & Compliance
Confirm your application: this system is designed specifically for the 2005-2010 Ford Mustang GT 4.6L and the GT500 5.4L, and works with both coupe and convertible body styles. It is CARB (California) compliant, making it an emissions-legal upgrade for street-driven cars. Please note the California Proposition 65 warning applies. Backed by Flowmaster’s Lifetime Limited Warranty, the Outlaw Cat-back is a lasting way to unlock a bolder exhaust note and a more aggressive attitude from your Mustang.
