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Flowmaster American Thunder Axle-Back Exhaust Ford Mustang GT 5.0L V8 w/ Factory Active Performance Exhaust Valves 2018-2022
$1799.95

If you own a 2018-2022 Ford Mustang GT coupe or convertible with the 5.0L engine and the Factory Active Performance Exhaust Option, you’re in for a treat! The new Flowmaster® American Thunder® Axleback exhaust system is designed just for you. This system features a pair of specially crafted Outlaw® series mufflers that provide a high flow, delivering a moderately aggressive tone both inside and outside your vehicle when the valves are closed. And when you're ready to let loose? Just open up the valves for a bold, aggressive sound that will turn heads!

Built to last, this system includes robust 3.00-inch mandrel-bent 409S stainless steel tubing, ensuring durability and longevity. Plus, we’ve added high-quality valves that work seamlessly with the factory exhaust actuators, giving you the option to crank up the sound whenever you want. The finishing touch? Stunning quad 4.00-inch polished 304 stainless steel tips that not only look fantastic but also match the powerful sound of your new exhaust.

Worried about installation? Don't be! We include all the necessary parts, hardware, and detailed instructions, making it easy for you to set it up right at home. And just to give you peace of mind, this system is backed by our Lifetime Limited Warranty.

Features:

  • Quad 4.00-inch Polished 304 Stainless Steel Tips
  • Designed for Vehicles with Active Performance Exhaust Option
  • Aggressive, Race-Proven Outlaw Mufflers
  • Dyno Tuned for Maximum Performance
  • Utilizes Factory Hanger Locations
  • Full Stainless Steel Construction
  • Straight-through Muffler Design
  • Lifetime Limited Warranty
  • Easy Installation

Specifications:

  • Brand: Flowmaster
  • California Proposition 65 Chemical Name: Chromium (hexavalent compounds)
  • California Proposition 65 Chemical Name: Nickel (Metallic)
  • California Proposition 65 Required: Yes
  • Catalytic Converter Included: No
  • Emission Code: 5
  • Exhaust Series: American Thunder
  • Exit Position: DOR
  • Heat Shield: No
  • Mount Type: Uses Factory Hangers
  • Muffler Body Length (in): 11
  • Muffler Color: Black
  • Muffler Finish: Painted
  • Muffler Inlet Diameter (in): 3
  • Muffler Inlet Location: Side
  • Muffler Material: 409S Stainless Steel
  • Muffler Outlet Diameter (in): 3
  • Muffler Outlet Location: Dual
  • Muffler Overall Length (in): 49.5
  • Muffler Part Number: Kit Only
  • Muffler Quantity: 2
  • Muffler Series: 60 Series
  • Muffler Shape: Oval
  • Muffler Type: Reflection
  • Product Type: Exhaust Systems / Kits
  • Single Dual: Dual
  • Sound Level: Moderate/Aggressive
  • System Type: Axleback
  • Tip Cut: Angle
  • Tip Diameter (in): 4
  • Tip Edge Style: Cut
  • Tip Finish: Polished
  • Tip Length (in): 5.25
  • Tip Logo: Embossed
  • Tip Material: 304 Stainless
  • Tip Quantity: 4
  • Tip Shape: Round
  • Tip Style: Double Wall
  • Tubing Diameter (in): 3
  • Tubing Material: 409S Stainless Steel
  • Warning: California Proposition 65

Notes:

  • Compatible with 2018-2022 Mustang GT 5.0L Coupes & Convertibles featuring Factory Active Performance Exhaust Valves.
Proposition 65

WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Vehicle
2019, 2021
Ford Mustang
2018-2023
Ford Mustang GT
2022-2023
Ford Mustang Mach 1

Flowmaster Banner

Who is Flowmaster?

Flowmaster is an aftermarket company that was founded in 1983. The company specializes in manufacturing high-performance exhaust systems for various vehicles. This includes classic muscle cars, modern sedans, trucks, jeeps, off-road vehicles, and more. 

It has since revolutionized the industry and has continued its tradition to produce high-quality exhaust parts. Today, Flowmaster has been the go-to brand of many car builders and enthusiasts worldwide and has been the market leader for years.

Pushing the Boundaries of Exhaust Design

Flowmaster has been the pioneer when it comes to developing mufflers. They produce mufflers that are quiet enough to be used legally on the streets but, at the same time, does not restrict the performance of the engine. This is why more and more people are choosing Flowmaster for their car builds as they can enjoy their vehicles on and off the streets.

An Exhaust For Any Style

The company provides its customers with the ability to choose the type of muffler they want. They offer five sound categories of their exhaust system, from quiet and discrete to something more aggressive and gives that racy sound. They can also choose between 12 designs of chambered mufflers, including their exclusively-designed “laminar-flow” muffler or “straight-through.”They also have a custom-built exhaust system for that one-of car builds.

Passionate Development Team

Flowmaster is composed of people who have years of experience in developing quality exhaust systems. Using the knowledge they acquired over the years, they improved their designs and matched it with the ever-growing technological advancement of vehicles today. 

Tried and Tested

With hundreds of installs under its belt, Flowmaster has proven itself to be a brand that delivers what it promised. In addition, all their exhaust systems are designed and dyno-tested, ensuring that they can maximize your vehicle’s performance once installed. 

Purchase Flowmaster at Vivid Racing

If you are in the market for an upgrade in your vehicle’s exhaust that would provide you with that distinct sound and improved performance, then Flowmaster is the brand for you. To know more about Flowmaster, visit Vivid Racing and check out their list of products that fit your requirement.




LIMITED WARRANTY:

This catalytic converter is warranted to be free from defects in materials andworkmanship subject to the exclusion and conditions set forth below and subject to the durational limits in this paragraph. This catalytic converter has been designed and manufactured and is warranted to meet federal Environmental Protection Agency emission requirements for 25,000 miles. The stainless steel body and the nipples alone are warranted for 5 years or 50,000 miles, whichever comesfirst. At the conclusion of the 5 year/50,000 mile or 25,000 mile period, whichever is applicable, all liability under this limited warranty shall terminate.

For full warranty information Click Here
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Sale price None
Wholesale price $1,380.56
Shipping Weight: 58.70
Length: 55
Width: 12
Height: 25
Product Added At Monday 04 June, 2018
Product Modified At Wednesday 06 August, 2025
Imported By ETLOverride
Last Edited By vendordata@vividracing.com
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Holley Performance Products Inc. $1,169.97 $2,024.95 ? $1,799.95 ? 2025-08-06 14:33:17

Manufacturer Direct Shipping
This item is available for direct shipping from the manufacturer. Please verify stock availability with the manufacturer. Once confirmed, you can place an order through [Meyer Distributing], who will arrange for dropshipping from the manufacturer directly to our customer.

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