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

An axle-back exhaust system replaces the mufflers and exhaust tips, typically starting from the rear axle. A cat-back system replaces everything from the catalytic converter back, including the mufflers and tips, offering a more comprehensive change to the exhaust flow and sound.

Does this Roush axle-back exhaust require welding or cutting to install?

No, this Roush axle-back exhaust system is designed for a direct bolt-on installation. It utilizes the factory exhaust hangers and mounting points, so no welding or cutting is required.

What kind of sound can I expect from this exhaust system?

This Roush axle-back system is designed to give your Mustang GT a deeper and more aggressive exhaust note compared to the stock system. It's a popular choice for owners looking for an improved sound that is noticeable but still comfortable for daily driving.

Specifications

Brand: Roush
Part #: 421127-BLK
UPC: 844764005172

Roush 11-14 Mustang GT Black Tip Axle Back Exhaust

Name: Roush 11-14 Mustang GT Black Tip Axle Back Exhaust
Brand: Roush
SKU: roush-roush-11-14-mustang-gt-black-tip-axle-back-exhaust-t14-850630
Price: 870.39 USD
Availability: BackOrder

$870.39

On Backorder — Expected to ship by Jun 14, 2026

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

Key Features

Fits 2011-2014 Ford Mustang GT.
Features 4-inch black-coated stainless steel exhaust tips.
Constructed from corrosion-resistant 409 stainless steel for durability.
Designed as an axle-back system, replacing mufflers and tips.
Provides a deeper, more aggressive exhaust note.
Utilizes factory exhaust hangers for a direct bolt-on installation.

This axle-back exhaust system is designed to fit the 2011-2014 Ford Mustang GT. Please verify fitment for your specific vehicle.

Secure CheckoutFast Shipping631-982-0042

About this part

Product Details

This Roush axle-back exhaust system is made for the 2011-2014 Ford Mustang GT. It replaces the factory mufflers and tips with a more performance-oriented setup, giving your Mustang a deeper, more aggressive exhaust note that's noticeable without being overwhelming. It's designed to bolt directly onto the factory exhaust hangers, making installation straightforward for someone comfortable working under their car.

Roush has a reputation for performance parts, and this axle-back system is built with that in mind. The mufflers are constructed from corrosion-resistant 409 stainless steel, which is a solid choice for exhaust components that see a lot of road spray and temperature changes. The system features 4-inch black-coated stainless steel tips that look sharp and add a custom touch to the rear of your Mustang. The black coating is durable and designed to withstand the heat and elements.

When you install this axle-back, you're not just changing the sound; you're getting a well-built exhaust component that's meant to last. It's a popular choice for Mustang owners looking to improve the sound and appearance of their GT without a full cat-back system. You'll want to make sure you have basic hand tools and possibly some penetrating oil for stubborn factory bolts, but no welding or cutting is required for this installation.