Powered by Mustang Enthusiasts - Call Now (866) 507-3786

2011-14 Mustang Roush Axle Back Exhaust Kit GT/GT500 5.0L/5.4L by Roush

Details   |  Description   |  Videos   |  Customer Photos   |  Reviews
  • Mustang Roush Axle-Back Exhaust Kit (11-14) 5.0L 5.4L
Mustang Roush Axle-Back Exhaust Kit (11-14) 5.0L 5.4L

Add horsepower & torque in your 2011-2014 Mustang GT/GT500 with a Roush Axle Back exhaust system.

Item #RSH-421127
MPN# 421127

Everyday Low Price: $629.99

In Stock Ships tomorrow!

Add to cart

This item is not eligible for discounts or coupon codes.

LMR Call Center is open Mon-Fri 8am-5pm CT. We are currently shipping orders at full capacity. Click Here for more updates.


  • Upgraded Aggressive Sound Tone Volume
  • Fits Both Ford Factory & Roush Rear Valance


  • 409 Stainless Steel Pipes And Muffler
  • Unique Open-Chambered Design
  • 304 Stainless Steel Exhaust Tips With Chrome Flashing
  • Does Not Negatively Affect Emissions
  • Provides Higher Air Flow
  • No In-Cockpit Boom

What's in the Box

  • (2) Axle Back Muffler W/ Hangers
  • (2) Polished Tips
  • (4) Band Clamps

Roush Brand Image

Product Description

Roush Axle Back Exhaust Kit
Give your 2011-14 5.0L Mustang the wild howl of American V8 muscle that it deserves. This innovative new exhaust system from ROUSH features a hollow muffler chamber, as opposed to conventional fiberglass-packing. The result is a unique and less inhibited sound, increased air flow, and increased longevity (there is no fiberglass that will break-down with time). Another great feature of this system is the lack of the in-cockpit boom normally found with performance exhaust systems at cruising speeds.

Roush Quality
Not only does this exhaust sound good, it looks good as well. The round tips are made from high-quality 304 stainless steel and are finished with a chrome flashing process. Conventional chrome plating uses layers of bonded chemicals to achieve its shiny appearance, which are susceptible to cracking and flaking especially when exposed to high temperatures (like exhaust). However, the chrome flashing used in this system is bonded micro-porously to the metal surface, and is as a result impervious to cracking from localized damage. This method of chroming is also resistant to heat color change.

As you would expect, the installation of this system is quick and easy. The exhaust uses the factory hanger mountings, so you don't have to fabricate your own. This kit also features new OE-quality spherical clamps for a better fit.

- Fits 2011-2014 Ford Mustang GT & GT500

ROUSH® Limited Warranty - Click Here

California Residents:

WARNING: Cancer and Reproductive Harm- www.P65Warnings.ca.gov

Related Articles

  • How To Install Mustang Axle Back Exhaust (11-14)

    Adding axle backs to your 2011-14 Mustang is the perfect way to make your Mustang stand out from the crowd by improving exhaust tones, and increasing performance! more

    Read more: 10 14 mustang , mustang , exhaust , axle back

    Posted on 12/12/2016

  • Product Videos

    2011-2014 Mustang GT Roush Axle Back Exhaust Sound Clip

    Check out our YouTube channel for even more tech tips, installation videos, how-tos, and more. The best place to go for anything Mustang related!

    Customer Photos (9)

    • Axle Back Exhaust Kit
    • Axle Back Exhaust Kit
    • Axle Back Exhaust Kit
    • Axle Back Exhaust Kit
    • Axle Back Exhaust Kit
    • Axle Back Exhaust Kit
    • Axle Back Exhaust Kit
    • Axle Back Exhaust Kit
    • Axle Back Exhaust Kit

    Vehicle Applications

    Ford Mustang - 2011 (11) - 2012 (12) - 2013 (13) - 2014 (14)

    About This Brand

    Roush - The Art of Performance Engineering
    ROUSH Performance is the first specialty-vehicle company to combine race-proven technologies with advanced automotive engineering. The result, a unique mix of street car and race car...Is a ROUSH car. Or more specifically, a ROUSH Mustang or F-150 pickup with styling, performance, and handling characteristics derived from the racetrack and modified for street legal usage. The vehicles and components produced by ROUSH Performance are imprinted with Jack Roush's vision, passion for performance, and commitment to excellence. He personally approves the design, engineering, fit, finish and overall performance of each package, ensuring that his personal standards are met prior to production and product release. Many of these products are designed by the same engineering group that has helped Roush Racing become the winningest Ford racing team in history.

    Look for Similar Items by Category

    Ford Mustang Parts » Mustang Exhaust » Mustang Axle Back Exhaust Systems
    2010-14 Mustang Top Performance Mods
    Top 10-14 Mustang Exhaust Mods
    Mustang Tech, Articles, How To Videos » 10-14 Mustang Tech, Articles, How To Videos » 10-14 Installs/Removals » How To Install Mustang Axle Back Exhaust (11-14)
    Top 50 2005-14 Mustang Parts
    2010-2014 Mustang Parts » 2010-2014 Mustang Exhaust » 2011-14 Mustang Axle Back Exhaust
    2010-14 Mustang Parts As Low as $10/month with Affirm!
    Great For The Garage - Bolt On Basics for Mustang
    Ford Mustang Parts » LMR Mustang Tech & News » 2010-2014 Mustang Tech & News » 10-14 Mustang Exhaust Tech & News » Mustang Axle Back Exhaust Comparison (11-14 5.0L)
    2005-14 Performance Essentials » Top 10-14 Mustang Performance Mods
    Featured 2010-2014 Mustang Parts

    Products by Vehicle