Search  for anything...

Roush Performance Products 421127 Axle-Back Exhaust Kit, 1 Pack

Condition: New
Checking for the best price...
$774.23
Holiday Deal was $774.99

Buy Now, Pay Later


As low as / mo
  • – Up to 36-month term if approved
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Zip, Apple Pay, and Google Pay. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Free shipping on this product

FREE 30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: Only 4 left in stock, order soon!
Fulfilled by PStuning

Arrives Monday, Nov 16
Order within 11 hours and 56 minutes

Available payment plans shown during checkout

Protect Your Purchase

Easy claims online, fast replacements, no fees

Checking for protection plans...

At a glance

Condition
New
Dimensions
21.5 x 10.25 x 24 in
Weight
27.6 lb

Features 3

  • Fits 2011-2014 Mustang GT 5.0L V8 & 2011-2012 GT500 5.4L V8
  • Upgraded aggressive sound tone and volume
  • Provides higher air flow and less back pressure for increased horsepower and torque

Description

The ROUSH Axle-Back Mustang Exhaust Kit with Round Tips, designed to fit the 2011-2014 Mustang GT & 2011-2012 Mustang GT500, is an innovative exhaust system from ROUSH that features an open-chambered designed muffler (as opposed to conventional fiberglass-packing). The result is an aggressive sound that is unique to ROUSH, increased longevity (with no fiberglass packing), and increased horsepower & with additional airflow. Another added benefit of this system is the lack of the in-cockpit boom normally found with performance exhaust systems at cruising speeds.

Specs 6

Manufacturer Roush Performance
Brand Roush
Item Weight 27.6 pounds
Product Dimensions 21.5 x 10.25 x 24 inches
Item model number 421127
Manufacturer Part Number 421127

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Nov 16

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


2013 mustang gt
Sounds amazing, great quality, highly recommend.
Reviewed in the United States on September 5, 2025 by Paul Bernal

Absolutely music to my ears for the money!!
This is absolutely hands down the best sounding Axle-Back exhaust system available for a Mustang. Then again, it’s Roush!! It is what I would expect.
Reviewed in the United States on October 24, 2023 by Robert Boeve

Louder that thought
Seems to be a lot louder than in their video. Look good, and the Shelby is putting out 620 Hp, without much effort.
Reviewed in the United States on November 17, 2019 by Kevin C.

Sounds Great
Love the sound
Reviewed in the United States on September 3, 2022 by David S.
Checking for best price...