Description
Overview
The Flowmaster® Outlaw Axle-back Exhaust System Kit is engineered specifically for the 2018-2023 Ford Mustang GT equipped with the 5.0L engine and the Factory Active Performance Exhaust Option. Built around a pair of race-proven Outlaw® Series mufflers, this performance exhaust delivers a very aggressive exterior sound level paired with a noticeable interior tone, giving your Mustang the presence its 5.0 deserves. As an axle-back catback-style upgrade, it bolts on using the factory hangers for a clean, direct fit on both coupes and convertibles.
Flow, durability, and longevity come from large 3.00-inch mandrel-bent 409S stainless steel tubing, while the whole car exhaust setup is finished with quad 4.00-inch black ceramic coated 304 stainless steel tips featuring an embossed tip logo. The result is an aggressive look that demands attention — and an exhaust note to match.
Key Benefits
When you shop for exhaust upgrades for the S550 Mustang GT, this Flowmaster kit stands out because it works with the factory active exhaust system. It includes a pair of high-quality valves that accommodate the OEM exhaust actuators (which you reuse), so you can open up the sound whenever you want. The dual tailpipe design, center-inlet and center-outlet Outlaw mufflers, and silver pipe finish combine race-bred performance with genuine street usability.
- Outlaw® Series dual mufflers tuned for a very aggressive exterior tone with a noticeable interior sound
- 3.00-inch mandrel-bent 409S stainless steel tubing for high flow and long-term durability
- Quad 4.00-inch black ceramic coated 304 stainless steel tips with an embossed logo
- Includes a pair of valves to work with the factory exhaust actuators (reuse OEM valve actuators)
- Mounts using factory hangers for a straightforward, at-home installation
- CARB (California) Compliant and covered by Flowmaster’s Lifetime Limited Warranty
Complete Kit & Easy Installation
This exhaust system kit arrives with the mufflers included, plus all necessary parts, hardware, and detailed instructions for an easy installation you can complete in your own garage. Because it uses the factory hangers and reuses your OEM valve actuators, there’s no need to modify your Mustang’s existing setup — making it a smart choice whether you’re comparing a Borla exhaust, Corsa exhaust, MagnaFlow exhaust, or Walker exhaust for your build.
Fitment
Designed exclusively for the 2018-2023 Ford Mustang GT with the 5.0L engine and Factory Active Performance Exhaust Option, this axle-back exhaust fits both coupes and convertibles. Please note this kit does not include a heat shield, and the mufflers are supplied as part of the kit only. As with all performance exhaust components sold in California, a Proposition 65 warning applies.
If you’ve been searching for a bolt-on performance exhaust system that transforms your 5.0 Mustang’s sound and appearance without complicated fabrication, the Flowmaster Outlaw axle-back delivers aggressive tone, premium materials, and a warranty-backed fit.
