2024-2025
2015-2023
2010-2014
2005-2009
1999-2004
1994-1998
1979-1993
Installation Time
(approx) 4 Hours
Difficulty Level:
Light to Moderate mechanical skill required.
Installation Guides
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Find Axle-Back Exhaust for your Mustang
Flowmaster Outlaw Axle-Back Exhaust System with Polished Tips (18-23 Mustang GT w/ Active Exhaust)Find parts that fit my vehicle
Item 404840-B
$1,216.76
500+ Reviews
3 Answers
On Sale
-10% $1,216.76 kit Was $1,351.95
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$229.00
Product Information
Features, Description, Reviews, Q&A, Specs & Installation
Features & Specs
- Axle-Back Exhaust
- Get the Tone and Power Your Mustang Needs
- 409S Stainless Steel Construction
- Dyno-Tuned
- Three-Inch Mandrel-Bent Pipes
- Four-Inch Polished Stainless Steel Tips
- Super Aggressive Sound
- Easy Installation
- Lifetime Limited Warranty
- Fits 2018-2023 Ford Mustang GT with Active Exhaust
| Brand | Flowmaster |
| Exhaust System Type | Axle-Back System |
| Exhaust System Material | Stainless Steel |
| Exhaust System Tip Finish | Chrome, Polished |
| Exhaust System Tubing Diameter | 3.00 Inch |
| Exhaust Loudness | Aggressive |
Description
Business in the Front, Party in the (Axle) Back. Your 2018-2023 Ford Mustang GT is a beast on the track, and when you’ve got something that good, aftermarket modifications from the best names out there are going to make it even better. So equip with the Flowmaster Outlaw Series Axle-Back Exhaust with Polished Tips and feel the power and hear the sound as you hit the gas.
Built to Last. These pipes are forged from super-sturdy 409 stainless steel pipe, which is mandrel-bent and dyno-tuned for maximum performance increases, even from its axle-back configuration. Its an efficient, straight-through build that is going to sound great and look great on the back of your Mustang as well.
Stylish Looks. The powerful 4-inch stainless tips are brought to a brilliant shine. They provide the signature outlaw sound that Flowmaster is known for.
Installation. You will need moderate mechanical expertise to put this Flowmaster Outlaw Series Axle-Back Exhaust with Polished Tips in correctly. Please make sure you have hand tools and either a car lift or jack stands to put this in. Allow about 4 hours for proper install. Please have this installed professionally if you lack the experience or tools.
Limited Lifetime Warranty. This axle-back kit is protected by a limited lifetime warranty, defending against material and manufacturer’s defects. Please see Flowmaster’s full warranty for more details.
Application. This Flowmaster Outlaw Series Axle-Back Exhaust with Polished Tips is designed to fit 2018-2023 Ford Mustang GT models with active exhaust.
Fitment:
- 2018 Ford Mustang
- 2019 Ford Mustang
- 2020 Ford Mustang
- 2021 Ford Mustang
- 2022 Ford Mustang
- 2023 Ford Mustang
Flowmaster 817825
CA Residents: 
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Installation & What's in the Box
Installation Info
What's in the Box
- (2) Pipes
- (2) Mufflers
- (2) Exhaust Tips
- Mounting Hardware
4.8
Customer Reviews (500+)
Questions & Answers (3)
Will It Fit My Mustang
- Bullitt - 19, 20
- GT - 18, 19, 20, 21, 22, 23
- Mach 1 - 21, 22, 23
