Roush Axle-Back Exhaust System Active iO Without Active Exhaust GT 2018-2021

100% of 100


  • Direct Fit
  • Mandrel Bent Tubing
  • Uses OEM Hangers
  • 304 Stainless Steel
MSRP $1,849.99
You save $50.00

Roush Active iO Axle-Back Exhaust System for 2018, 2019, 2020 and 2021 GT Mustangs without the Active Exhaust Option.

If you're ready to modify your 2018-2021 GT Mustang, than this Roush Active iO Axle-Back Exhaust System (422128) is calling your name! Don't wait and order your axle-back kit from CJ Pony Parts now!

Active iO Axle-Back Features:
- Direct-fit upgrade for 2018-2021 GT Convertible and Fastback Mustangs without the factory active exhaust option
- Features corrosion-resistant mandrel-bent 304 stainless steel tubing
- Includes dual high-flow mufflers and quad (4) stainless steel tips
- Also includes red console-mounted selector switch to seamlessly switch between 'open' and closed'
- Convenient plug-and-play installation with included wiring, modules, hardware and instructions
- Kit will re-use your OE hangers and mounting points

Roush Performance is the industry-leading brand when it comes to modifying and upgrading your brand-new GT Mustang, and this all-new Active iO Axle-Back is their latest and greatest upgrade kit! Your new exhaust kit features superior mandrel-bent stainless steel tubing and includes gleaming quad tips and two hi-flo mufflers. This Active iO exhaust features electronic valve technology, which sets it apart from anything else available in the market. You'll be able to seamlessly open or close your exhaust at any time, letting you customize and control your pony's sound. You can have your Mustang roar down the street or you can close the system for a quiet trip on the highway. This is the ideal option, giving your Mustang the best of both worlds, so what are you waiting for? Pick up your all-new upgraded axle-back system now from CJ's!

Please Note: This exhaust is for 2018-2021 model Mustangs ONLY. It will not fit 2015-2017 models regardless of the installed valance.

Tech Tip: Installation requires cutting of the factory exhaust piping. Once the modifications have been made to the factory exhaust system, installation is a simple bolt-in procedure.

How well do you want your Mustang to look and perform? With any of the parts from Roush Performance, you can give it a major performance overhaul and add some visual styling that will make your Mustang stand out from the crowd. Browse around and order your next performance upgrade kit from CJ's today!

Go ahead and purchase this brand-new premium Roush 422128 Active iO Axle-Back Exhaust System for your 2018, 2019, 2020 or 2021 GT Mustang without the Active Exhaust Option today from CJ Pony Parts!

California Residents: Proposition 65 Warning

Installation Difficulty


Intermediate skill is required for this installation.

Vehicle Fitment

This product will fit the following Mustang years:

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