Flowmaster Axle-Back Exhaust System American Thunder Stainless Steel 3" With 4" Polished Quad Exhaust Tips Without Active Exhaust GT 2018-2023

95% of 100


  • Direct-Fit Upgrade
  • Made Of 409 Stainless Steel
  • Mandrel-Bent 3" Tubing
  • Made In The USA
MSRP $1,056.00
You save 10%

Flowmaster 3" Stainless Steel American Thunder Axle-Back Exhaust System with 4" Polished Quad Exhaust Tips for 2018, 2019, 2020, 2021, 2022, and 2023 GT Mustangs without the Active Exhaust Option.

If you're ready to start modifying your all-new 2018-2023 Convertible or Fastback Mustang, then this Flowmaster 3" Stainless Steel American Thunder Axle-Back Exhaust System with 4" Polished Quad Exhaust Tips (817807) is calling your name! Grab yours from CJ Pony Parts today!

Features and Benefits:
- Direct-fit upgrade for 2018-2023 Mustangs
- Dyno tested to achieve maximum performance
- Provides a moderately aggressive exhaust sound
- Manufactured from 409 stainless steel mandrel-bent 3" tubing
- Features Flowmaster's patented Delta Flow Technology
- Includes black powder-coated Super 44 Series mufflers
- Also includes premium-quality polished 4" double wall angle-cut quad exhaust tips
- Bolt-on installation made easier with provided mounting hardware
- Made here in the USA

Vehicle Fitment:
- 2018-2022 GT Mustangs without the Active Exhaust Option
*For 2018+ models only. This exhaust will NOT fit 2015-2017 models regardless of the installed valance.

Flowmaster's American Thunder axle-back exhaust system is the perfect balance between a lame stock exhaust and an aggressive, performance-driven kit. It provides a moderately aggressive sound that lets everyone know exactly when you've arrived in your new pony! The complete upgraded system includes premium-quality stainless steel mandrel-bent tubing as well as dual 44 Series mufflers, which provide maximum airflow. Flowmaster tests each system in-house to ensure it will provide you with the maximum increase for improved overall performance. You'll absolutely love the quad-polished tips and the high-end look they provide your pony's exterior, so what are you waiting for? Don't hesitate and purchase this upgraded axle-back kit now from CJ's!

Please Note: This system is only designed for use with models that are not equipped with the Active Exhaust Option from the factory.

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.

When you're looking for an exhaust for your favorite Mustang, every owner needs to check out Flowmaster's exhaust systems and mufflers. Flowmaster is a manufacturer of just about any part you need for your Mustang's exhaust, from full exhaust systems and exhaust kits to mufflers and accessories. CJ Pony Parts is proud to offer dozens of Flowmaster's premium exhaust products for your Mustang--browse around and place your order now!

California Residents: Proposition 65 Warning

Installation Difficulty


Novice skill is required for this installation.

Vehicle Fitment

This product will fit the following Mustang years:

Only registered users can ask/answer questions. Please sign in or create an account.
Write Your Own Review
Only registered users can write reviews. Please Sign in or create an account