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

2011-14 Mustang Roush Axle Back Exhaust Kit GT/GT500 5.0L/5.4L
2011-14 Mustang Roush Axle Back Exhaust Kit GT/GT500 5.0L/5.4L
2011-2014 Mustang GT Roush Axle Back Exhaust Sound Clip

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: $749.99

Ships by Tuesday, April 30
This item is not eligible for discounts or coupon codes.
 This item is returnable. Details

Free Shipping over $99

 Add to Cart

× close

Made in the USA


  • 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 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

  • Ford Mustang - 2011, 2012, 2013, 2014
  • Sub Models: GT, GT500
  • Engines: 5.0L, 5.4L

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!

California Residents:
Prop 65 Warning SignWARNING: Cancer and Reproductive Harm-

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.
Add to Cart