Free shipping on orders over $100 - Details

Flowmaster Outlaw Axle-back Exhaust System

2015-2021 Ford Mustang, 2.3L Ecoboost & 3.7L. Both Coupes and Convertible

Part # 817823 Be the first to write a review
In Stock
Free Shipping
Your Price
Suggested Retail
Add to Wish List
Create a new list
Starting at $52 a month with Learn More
The new Outlaw® Axle-back exhaust system is specifically designed for all 2015-2021 Ford Mustang coupes and convertibles with the 2.3L Ecoboost or 3.7L engines. System features include large 3.00-inch mandrel-bent tubing flowing into a pair of race-proven Outlaw series mufflers for an aggressive exterior sound level, with a noticeable interior tone. Other features include a pair of large 4.00-inch black ceramic coated stainless steel tips for an aggressive look and the system uses the factory hangers for a quick and easy installation. The system includes all necessary parts, hardware, and instructions and is covered by our Flowmaster® Lifetime Limited Warranty. Note: Fits both Coupes and Convertibles.


  • 4.00-inch Black Ceramic Coated Stainless Steel Tips
  • Aggressive Race Proven Outlaw Mufflers
  • Dyno-tuned for Maximum Performance
  • Large Mandrel-bent 3.00-inch Tubing
  • Uses the Factory Hanger Locations
  • Full Stainless Steel Construction
  • Flowmaster Quality
  • Easy Installation

About Flowmaster

Flowmaster® is a household name, and for good reason. They've built legendary exhaust systems and mufflers for decades, and now offer performance air intakes, catalytic converters, and headers to give your hot rod performance to match the iconic Flowmaster sound.

Brand Flowmaster
Bullet Point #1Aggressive Race Proven Outlawï¿1/2 Mufflers
Bullet Point #2Dyno-tuned for Maximum Performance
Bullet Point #3Full Stainless Steel Construction
Bullet Point #4Easy Installation
Catalytic Converter IncludedNo
Emission Code5
Exhaust SeriesOutlaw
Exit PositionDual Out Rear
Heat ShieldNo
Material409 Stainless Steel
Mount TypeUses Factory Hangers
Muffler Body Length (in)49
Muffler ColorBlack
Muffler FinishPainted
Muffler Inlet Diameter (in)3
Muffler Inlet LocationCentered
Muffler Material409S Stainless Steel
Muffler Outlet Diameter (in)3
Muffler Outlet LocationCentered
Muffler Overall Length (in)10.5
Muffler Part NumberKit Only
Muffler Quantity2
Muffler SeriesOutlaw
Muffler ShapeRound
Muffler TypeReflection
Product TypeExhaust System
Single DualDual
Sound LevelAggressive
System TypeAxle-back
Tip CutAngle
Tip Diameter (in)4
Tip Edge StyleCut
Tip FinishBlack Ceramic
Tip Length (in)5.25
Tip LogoEmbossed
Tip Material304 Stainless
Tip Quantity2
Tip ShapeRound
Tubing Diameter (in)3
Tubing Material409S Stainless Steel
California Proposition 65 Chemical NameChromium (hexavalent compounds)
Nickel (Metallic)
California Proposition 65 RequiredYes
Part Number817823

This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

2015-2021 Ford Mustang, 2.3L Ecoboost & 3.7L engines. Fits both Coupes and Convertibles.

    Your Review

    *Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages.

    Some parts are not legal for use in California or other states with similar regulations.