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Flowmaster

Flowmaster Outlaw Cat-Back Exhaust System

Part # 818161

Fits 2024-2026 Ford Mustang GT 5.0-liter, Outlaw Cat-Back 3.0-inch Stainless Steel Exhaust System, 4.0-inch Dual Black Tips

Flowmaster Outlaw Cat-Back Exhaust System

In Stock
Free Shipping - Lower 48 US States
Advertised Price $1,899.95
$1,708.95
Save $191.00
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5

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® Cat-back exhaust system for the 2024-2026 Ford Mustang GT 5.0-liter is perfect for the person looking for a very aggressive exhaust tone inside and outside the vehicle, with all of the performance benefits that you would expect from Flowmaster®. This easy to bolt-on emissions-legal system features dual 3.0-inch stainless steel mandrel-bent tubing and our exclusive Scavenger® Series X-pipe for a deep unique tone and maximum power. Other features include a pair of our race-proven Outlaw Series mufflers finished off with quad 4.00-inch black ceramic coated tips for a modern look. Like all Flowmaster systems, the benefits include improved throttle response, power and mileage. Designed for an easy fit, this system includes all necessary parts, hardware and installation instructions. This system does not fit models with the Active Performance Exhaust option. Fits both coupes and convertibles. Backed by Flowmaster's Lifetime Limited Warranty.

Features:

  • Max increases of up to 18 hp and 18 lb-ft over the stock exhaust at the rear wheels
  • Outlaw series performance muffler offers a deep powerful sound and increased performance
  • 409 stainless steel construction delivers extra durability and improved long-term corrosion resistance
  • Uses factory hanger locations for easy installation
  • 3.0-inch 16-gauge mandrel bent stainless steel tubing helps maintain maximum exhaust flow for better power
  • Includes all necessary hardware for an at home installation
  • Dual 4.00-inch black ceramic coated steel tips add a custom look
  • Includes Scavenger Series X-Pipe for maximum tone and performance
  • Lifetime Limited Warranty

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 Quantity2
Exhaust Tip ResonatedNo
Exhaust Tip ShapeRound
Exhaust Tip WallDouble Wall
Exit StyleDual Out Rear
FinishNatural
Gasket Or Seal IncludedNo
Grade TypePerformance
Hangers IncludedYes
Inlet TypeClamp-On
Main Piping Diameter3.00 IN
Mount TypeUses Factory Hangers
Mounting Bracket IncludedNo
Muffler (Left) Body Height4.00 IN
Muffler (Left) Body Length10.50 IN
Muffler (Left) Body Width4.00 IN
Muffler (Left) TypeReflection
Muffler (Right) Body Height4.00 IN
Muffler (Right) Body Length10.50 IN
Muffler (Right) Body Width4.00 IN
Muffler (Right) TypeReflection
Muffler Body Diameter4.00 IN
Muffler Body Height4.00 IN
Muffler Body Length10.50 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 ConnectionSlip-Fit
Muffler Outlet Diameter3.00 IN
Muffler Outlet LocationCenter
Muffler Outlet Quantity1
Muffler Overall Length16.75 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 / Moderate
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
TypeCat-Back
Valve IncludedNo
Valve TypeNot Applicable
UPC090127844717
California Proposition 65 Chemical NameChromium (hexavalent compounds)
Nickel (Metallic)
Part Number818161
5

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.
Instructions - 818161_instructionsV2.pdf
Instructions - Flowmaster Warranty 26 Update.pdf
Will not fit vehicles with Active performance exhaust. (2 exhaust tips per side )

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*Free Shipping and Handling only offered to the contiguous US on orders over $149, excludes clearance parts and oversized packages.

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

Flowmaster Outlaw Cat-Back Exhaust System
Flowmaster Outlaw Cat-Back Exhaust System
Advertised Price $1,899.95
$1,708.95
Save $191.00