Flowmaster Cat-Back Exhaust Kit American Thunder Stainless Steel Without Active Exhaust EcoBoost 2015-2021

100% of 100


  • Stainless Steel Construction
  • Aggressive Exhaust Tone
  • Made In The USA
  • Includes Necessary Hardware
MSRP $1,002.00
You save 10%

Flowmaster Stainless Steel American Thunder Cat-Back Exhaust Kit for 2015, 2016, 2017, 2018, 2019, 2020 and 2021 EcoBoost Mustangs without the Factory Active Exhaust Option.

Want to amplify the exhaust note of your 2015-2021 EcoBoost Mustang to give it a more sporty and aggressive sound? Then you should check out this Flowmaster Stainless Steel American Thunder Cat-Back Exhaust Kit from CJ Pony Parts!

Benefits and Features:
- Constructed from 409S Stainless Steel
- Mandrel Bent 2-1/4” Tubing
- 2-1/2” Scavenger Y-Pipe
- Black Powder-Coated Finish
- Polished 4” Double Wall Angle Cut Exhaust Tips
- Race-Inspired Outlaw Technology
- Dyno Tested to Achieve Maximum Performance
- Moderate to Aggressive Exhaust Note
- Fits Fastback and Convertible
- Includes Hardware for Installation
- Made in the USA

With a 409S stainless steel construction and black powder-coated finish for added durability, this Flowmaster Stainless Steel American Thunder Cat-Back Exhaust Kit will look great and last on your Mustang for many miles down the road. This cat-back system is perfect if you are looking for a moderate to aggressive exhaust note. Not only does this exhaust sound great, but it also provides all the performance benefits that you would expect from a Flowmaster exhaust!

This system features a pair of Flowmaster’s race-inspired Outlaw Series mufflers, a 2-1/2” Scavenger Y-Pipe and mandrel bent 2-1/4” tailpipes that all work together to optimize performance. The kit ends in a pair of beautifully polished 4” double wall angle cut exhaust tips with embossed Flowmaster logos adding a nice custom touch to the exhaust. Made in the USA, Flowmaster includes all the necessary hardware needed to make installation a breeze.

*Will not fit 2019-2021 EcoBoost Mustangs that are equipped with the Active Exhaust Option from the factory.

Please Note: 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 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.

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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