PLEASE NOTE: Due to tremendous demand, your order is likely to be delayed up to 4-8 weeks. We are doing everything we can to reduce this time. Sorry for the inconvenience, and thank you for your patience.

2018-2021 Mustang 5.0L V8 ROUSH Active iO Exhaust Kit

Part #: 422128

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Application: Mustang 2018-2021
Installation Difficulty:
Intermediate ?
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International Purchases & Shipping

Prices stated here are only for sales within the continental United States and ordered via the web site. Prices for other territories and countries may vary due to shipping fees, duties, and other factors.

Orders placed via can only be shipped to areas within the continental U.S. If you live outside the U.S., please orders must be placed through an authorized ROUSH dealer.

Product highlights for the 2018-2021 Mustang 5.0L V8 ROUSH Active iO Exhaust Kit:

  • Fits 2018-2021 Mustang 5.0L V8 GT - Convertible And Fastback
  • OE-Level Engineering And Construction For Long Life and Perfect Fit
  • Corrosion-Resistant 304 Stainless Steel
  • Axle-Back Exhaust with Dual High-Flow Mufflers
  • Quad T-304 Stainless Steel Tips
  • Full Mandrel Bending
  • Uses OEM Hangers And Mounting Points
  • No Welding Required
  • Custom ROUSH Red Open/Close Switch
  • Convenient Plug-And-Play Installation
  • Includes All Necessary Wiring, Modules, Hardware, And Instructions

Take control! Our new ROUSH Performance Active iO exhaust kit uses electronic valve technology that allows drivers to seamlessly open or close their exhaust at any time. Whether you want to hear your Mustang roar, or quietly cruise on a long road trip, this exhaust gives you control over your Pony's sound!

With high-performance mufflers, corrosion-resistant T-304 stainless steel and high-flow mandrel bends, our ROUSH Performance Active iO Exhaust kit uses next-gen valve technology to control your exhaust note and make your Pony stand out from the crowd. The ROUSH Performance Active iO exhaust kit allows the driver to use the included console-mounted selector switch to seamlessly switch their exhaust between "Open" and "Closed" modes in the blink of an eye.

Want full customization of your exhaust? Check out our Patented ROUSH Performance Active Exhaust System (#422100), which offers limitless customization of your exhaust note through our Active Exhaust mobile app and 4-mode console switch.

**ROUSH Performance recommends checking your local noise ordinance levels prior to purchase.

WARNING: Cancer and Reproductive Harm -
Application Mustang 2018-2021
Difficulty Intermediate
Time 4 hours 30 minutes
Tools Garage Tools
Instruction URL Download Instruction Manual