Corsa Axle-Back Exhaust Kit Sport 3" With 4" Polished Tips GT Fastback Without Factory Active Exhaust 2018-2021



  • Aggressive Sport Sound
  • Made In The USA
  • Drone-Free Cruising
  • Made of 304 Stainless Steel
MSRP $1,621.91
You save 19%

Corsa 3" Sport Axle-Back Exhaust Kit With 4" Polished Tips For 2018, 2019, 2020 and 2021 GT Fastback Mustangs Without The Factory Active Exhaust Option.

The Corsa 3" Sport Axle-Back Exhaust Kit 21039 with 4" Polished Tips for 2018-2021 GT Fastback Mustangs will upgrade your sound to the hum of a high-performance engine. Improve your engine's proficiency, too, with Corsa's back pressure reduction technology. You can maintain the efficiency of you S550's power while gaining the sound of a muscle car.

Features and Benefits:
- Made of 304 Stainless Steel and 3” Mandrel-bent Piping
- Includes 4” Polished Quad Exhaust Tips
- Sport Sound Level Provides a Distinct Rumble at Idle
- Provides an Aggressive High Performance Sound through the Gears
- Patented Reflective Sound Cancellation (RSC) Technology
- RSC Terminates Frequencies that cause Cabin Drone During Cruising
- State-of-the-Art Straight-through Design Reduces Back Pressure
- Reduced Back Pressure Increases Engine Proficiency
- Step-down Flanges for OEM Connection
- Includes Instructions and ALL Necessary Hardware
- Easy Bolt-on Installation
- Made in the USA

Corsa's RSC technology ensures the experience is just as enjoyable as the sound coming out of your new investment. Enjoy the patented sound cancellation technology on the inside, while you zoom down the street with your new OEM connection axle-back. CJ Pony Parts understands the excitement of getting a more aggressive exhaust on your S550, which is why this kit includes all the necessary hardware for an simpler install. Made in the USA, the quality 304 Stainless Steel is mandrel-bent for 3" piping.

Tech Tip: Installation requires cutting of the OE mid-pipes. Once the proper cuts have been made to the factory exhaust system, installation is a simple bolt-on process.

*This exhaust will NOT fit 2015-2017 models regardless of installed valance.

*NOT designed for use with convertibles models.

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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