Description
Overview
The Flowmaster Outlaw Axle-back Exhaust System is engineered to transform the sound and stance of your 2015-2017 Ford Mustang GT 5.0L, available for both coupe and convertible body styles. Part of Flowmaster’s aggressive Outlaw series, this axle-back kit swaps out the restrictive factory rear section for a race-proven setup that delivers a bold exterior tone while keeping the interior sound level moderate enough for daily driving.
At the heart of the system is a pair of race-proven Outlaw mufflers, each measuring 49.00 inches in overall length with a center inlet and center outlet configuration and a 3.00-inch outlet diameter. Finished in durable black to match the black-coated piping, the mufflers are built to produce that unmistakable Flowmaster aggressive sound level your Mustang deserves.
Performance & Flow
The system starts with 2.50-inch connections for an easy, precise fit to the stock mid-pipe, then quickly expands to full 3.00-inch mandrel-bent inlet tubing. That smooth, mandrel-bent path feeds directly into the pair of Outlaw mufflers for maximum flow and performance, while the dual tailpipe design keeps the exhaust exit true to the muscle-car look.
Installation
This is a genuinely home-friendly upgrade. The Outlaw axle-back is supported entirely from the factory hanger locations, so there’s no cutting or custom fabrication required for the hardware to hang correctly. That makes for a hassle-free bolt-on installation you can tackle in your own garage with basic hand tools.
The Finishing Touch
The kit is capped off with a pair of large 4.00-inch polished stainless steel tips featuring an embossed Flowmaster logo. The polished finish and generous diameter give the rear of your Mustang the aggressive, purposeful appearance that backs up the sound.
- Fitment: 2015-2017 Ford Mustang GT 5.0L coupes and convertibles
- Type: Axle-back system with dual tailpipes and two Outlaw mufflers included
- 2.50-inch connections expanding to full 3.00-inch mandrel-bent inlet tubing
- Outlaw mufflers: 49.00-inch length, center inlet/center outlet, 3.00-inch outlet, black finish
- 4.00-inch polished stainless steel tips with embossed logo
- Mounts to factory hanger locations — no custom fabrication needed
- CARB (California) compliant; Emission Code 5
If you want an aggressive exterior note with a livable interior sound level, a straightforward at-home install, and a serious visual upgrade, the Flowmaster Outlaw Axle-back is a proven choice for the S550 Mustang GT. Note: this product carries a California Proposition 65 warning.
