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Flowmaster Outlaw Axle-back Exhaust System

Part # 817806 Be the first to write a review

Fits 2018-2023 Mustang GT 5.0L Coupes & Convertibles without Factory Active Performance Exhaust Valves. - Aggressive sound

Flowmaster Outlaw Axle-back Exhaust System

Estimated Ship Date: 08/31/2026
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Advertised Price $972.95
$874.95
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Emissions

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.

See Emissions Details
The Flowmaster® Outlaw Axle-back exhaust system is specifically designed for the 2018-2023 Ford Mustang GT coupes and convertibles with the 5.0L engine. This system features a pair of race-proven Outlaw® Series mufflers for an aggressive exterior sound level with noticeable interior sound. The system utilizes 3.00-inch mandrel-bent 409S stainless steel tubing, utilizes the factory hanger locations for an easy installation, and is finished off with quad 4.00-inch black ceramic coated tips for an aggressive look that matches the attitude of the sound. This axle-back system retains the factory resonator mid-pipe. For more sound and power, check out our Scavenger® Series no resonator X-Pipe kit part #817817. This system is designed for vehicles without active exhaust valves and includes all the necessary parts, hardware and installation instructions.

Features:

  • Large 4.00-inch Black Ceramic Coated Tips
  • Aggressive Race-proven Outlaw Mufflers
  • Dyno-tuned for Maximum Performance
  • Full Stainless Steel Construction
  • Uses Factory Hanger Locations
  • Lifetime Limited Warranty
  • Easy Installation

About Flowmaster

Shop the complete line of Flowmaster products for exhaust systems, mufflers, and more that deliver the iconic Flowmaster sound. Available at Holley.com!

Brand Flowmaster
California Proposition 65Yes
CARB (California) CompliantYes
Catalytic Converter IncludedNo
Catalytic Converter Quantity0
CategoryExhaust
Clamping TypeFlat Band
Clamps IncludedYes
Emission Code5
Exhaust SeriesOutlaw
Exhaust Tip ColorBlack
Exhaust Tip ConnectionWelded
Exhaust Tip CutAngled
Exhaust Tip Diameter4.00 IN
Exhaust Tip EdgeAngle Cut
Exhaust Tip FinishBlack Ceramic Coating
Exhaust Tip IntercooledNo
Exhaust Tip Length5.25 IN
Exhaust Tip Material304 Stainless Steel
Exhaust Tip Quantity4
Exhaust Tip ResonatedNo
Exhaust Tip ShapeRound
Exhaust Tip WallDouble Wall
Exit StyleDual Out Rear
FinishNatural
Gasket Or Seal IncludedNo
Grade TypePerformance
Hangers IncludedYes
Heat Shield IncludedNo
Inlet TypeClamp-On
Main Piping Diameter3.00 IN
Mount TypeUses Factory Hangers
Mounting Bracket IncludedNo
Muffler (Left) Body Height4.00 IN
Muffler (Left) Body Length6.50 IN
Muffler (Left) Body Width4.00 IN
Muffler (Left) TypeReflection
Muffler (Right) Body Height4.00 IN
Muffler (Right) Body Length6.50 IN
Muffler (Right) Body Width4.00 IN
Muffler (Right) TypeReflection
Muffler Body Diameter4.00 IN
Muffler Body Height4.00 IN
Muffler Body Length6.50 IN
Muffler Body Material409 Stainless Steel
Muffler Body ShapeRound
Muffler Body Width4.00 IN
Muffler ColorBlack
Muffler FinishBlack High-Temperature Paint Finish
Muffler Flanged InletNo
Muffler Flanged OutletNo
Muffler IncludedYes
Muffler Inlet ConnectionSlip-Fit
Muffler Inlet Inside Diameter3.00 IN
Muffler Inlet LocationCenter
Muffler Inlet Outside Diameter3.13 IN
Muffler Outlet Diameter3.00 IN
Muffler Outlet LocationCenter
Muffler Outlet Quantity1
Muffler Overall Length49.50 IN
Muffler Part NumberKit Only
Muffler Quantity2
Muffler SeriesOutlaw
Muffler TypeReflection
Part TypeExhaust System
Pipe ColorSilver
Pipe Material409 Stainless Steel
Product TypeExhaust System
Sound LevelAggressive
Spring Bolt Kit IncludedNo
Sub CategoryExhaust and Tail Pipes
Tail Pipe Outlet Outside Diameter3.00 IN
Tail Pipe Quantity2
Dual
Tail Pipe Tapered OutletNo
Tip LogoEmbossed
TypeAxle-Back
Valve IncludedNo
Valve TypeNot Applicable
UPC700042037612
California Proposition 65 Chemical NameChromium (hexavalent compounds)
Nickel (Metallic)
Part Number817806
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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.
Fits 2018-2023 Mustang GT 5.0L Coupes & Convertibles without Factory Active Performance Exhaust Valves.
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