What is the main difference between an axle-back and a cat-back exhaust system?

An axle-back exhaust system replaces the mufflers and tips, which are located at the rear axle. A cat-back system replaces everything from the catalytic converter back, including the mid-pipe, mufflers, and tips. This Roush system is an axle-back, focusing on sound and appearance at the rear of the vehicle.

Does this exhaust system require any welding for installation?

No, this Roush axle-back exhaust system is designed as a direct bolt-on replacement for the factory components. It utilizes existing mounting points and typically requires basic hand tools for installation, without the need for welding.

What is the expected sound level of this exhaust system?

This system is designed to provide an aggressive, race-inspired sound for your 5.0L Mustang GT. While it improves upon the stock sound, the exact volume can vary based on driving conditions and personal perception. It aims for a powerful tone without being excessively loud for daily driving.

Roush 2018-2023 Ford Mustang 5.0L GT Axle-Back Exhaust Kit

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Specifications

Brand: Roush
Part #: 422097
UPC: 844764006775

Roush 2018-2023 Ford Mustang 5.0L GT Axle-Back Exhaust Kit

Name: Roush 2018-2023 Ford Mustang 5.0L GT Axle-Back Exhaust Kit
Brand: Roush
Price: 819.19 USD
Availability: InStock

$819.19

On Backorder — Expected to ship by Apr 16, 2026

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Fits 2018-2023 Ford Mustang GT 5.0L. Roush Axle-Back Exhaust Kit for an aggressive sound and improved performance.

Key Features

Fits 2018-2023 Ford Mustang GT 5.0L.
Constructed from corrosion-resistant T-304 stainless steel for durability.
Mandrel-bent tubing ensures consistent diameter for improved airflow.
Dual high-flow mufflers enhance the V8 sound and reduce back pressure.
Features quad polished T-304 stainless steel exhaust tips for an aggressive look.
Designed to provide a race-inspired exhaust note and improved performance characteristics.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Fits this vehicle

Ford Mustang 2018-2023

Product Details

This Roush Axle-Back Exhaust Kit is made specifically for the 2018 through 2023 Ford Mustang GT models with the 5.0L V8 engine. If you're looking to give your Mustang a more aggressive, race-inspired sound and a more powerful look, this system is a solid choice. It replaces the stock mufflers and tips, directly improving the exhaust note and appearance of your car.

Constructed from T-304 stainless steel, this exhaust system is built to resist corrosion, meaning it'll hold up well over time. The pipes are mandrel-bent, which helps maintain a consistent diameter for better airflow. Roush spent a lot of time testing and validating this design to make sure it reduces back pressure and improves exhaust flow. This means your V8 can breathe a little easier, potentially leading to a more responsive feel. The system features dual high-flow mufflers and quad polished T-304 stainless steel tips that give your Mustang a distinct, aggressive look and sound.

Installation involves replacing the factory axle-back section, which is a common upgrade for Mustang owners. This kit is designed to fit right onto your existing exhaust system, making the installation process more straightforward. You'll notice a significant change in the exhaust tone, making your 5.0L GT sound as powerful as it looks.