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Vehicle Info NeededFLOWMASTERPART NUMBER: 389-817808
Outlaw Series Cat-Back Exhaust System 2018 Mustang GT 5.0L V8
$2,04995
Ships on 10/13/2026
Lowest Price GuaranteeFord
Outlaw Series Cat-Back Exhaust System 2018 Mustang GT 5.0L V8 3" Tubing 4" Carbon Fiber Stainless Steel Tips Dual Rear Exit 409S Stainless Steel
FLOWMASTER MUFFLERS 817808 Features:
The Flowmaster Outlaw® Cat-back exhaust system for the 2018-2023 Ford Mustang GT 5.0L 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 3.00-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 carbon fiber 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. Notes: This system does not fit models with the Active Performance Exhaust option. Vehicles with the Factory Active Performance Exhaust option will use system #817800.- Not For Vehicles With Active Exhaust Valves
- Very Aggressive Interior & Exterior Sound
- Dyno-Tuned for Maximum Performance
- Our Exclusive Scavenger Series X-Pipe
- Quad 4.00-inch Carbon Fiber Tips
- Full Stainless Steel Construction
- Lifetime Limited Warranty
- Flowmaster Quality
Aggressive Race-Oriented Exhaust System
Flowmaster Outlaw Series Exhaust Systems feature race-bred components that ensure minimal flow restriction (slight sound reduction) over open exhaust tubing on vehicles without catalytic converters. With easy fit in mind, these systems are mandrel-bent for maximum performance and mount using stock hanger locations. Outlaw systems are dyno-tuned to improve throttle response, deliver an ultra-aggressive interior/exterior tone, and include all necessary parts and hardware for easy installation.
Part TypeExhaust System
Product LineFlowmaster Outlaw Series Exhaust Systems
BrandFLOWMASTER
Package Height12.0
Package Width25.0
Package Length52.0
Weight54.88 PG
Muffler Body Diameter4 in.
Tailpipe Diameter (In.)3
Muffler Inlet Inside Diameter3 in.
Hangers IncludedYes
Main Piping Diameter3 in.
Tail Pipe QuantityDual
Inlet TypeClamp-On
Exhaust Tip MaterialCarbon Fiber
Catalytic Converter Quantity0
Muffler Body Length6.50 in.
Sound LevelAggressive
Muffler Body Material409 Stainless Steel
Exhaust Tip CutAngled
Gasket Or Seal IncludedNo
Exhaust Tip IntercooledNo
Pipe ColorSilver
Muffler Quantity2
Muffler Inlet Outside Diameter3.13 in.
Muffler Flanged OutletNo
Exhaust Tip ResonatedNo
Muffler Outlet LocationCenter
Catalytic Converter IncludedNo
Heat Shield IncludedNo
Part CategoryPerformance Parts
Exhaust Tip WallDouble Wall
Exhaust Tip Quantity4
Muffler Inlet LocationCenter
Exhaust Tip FinishCarbon Fiber
Exhaust Tip EdgeRolled Edge
Valve IncludedNo
Muffler TypeReflection
Pipe Material409 Stainless Steel
Muffler Body Width4 in.
Tail Pipe Tapered OutletNo
Muffler Body ShapeRound
Mounting Bracket IncludedNo
Muffler Outlet Quantity1
Muffler FinishBlack High-Temperature Paint Finish
Mount TypeUses Factory Hangers
Clamps IncludedYes
Tip Outlet Size4 in (101.6 mm)
FinishNatural
Exit StyleDual Out Rear
Muffler Body Height4 in.
Clamping TypeFlat Band
Muffler Flanged InletNo
Spring Bolt Kit IncludedNo
Muffler SeriesOutlaw
Muffler IncludedYes
Exhaust Tip ConnectionWelded
Tail Pipe Outlet Outside Diameter3 in.
Valve TypeNot Applicable
Intermediate Pipe Diameter3 in (76.2 mm)
Exhaust Tip Diameter4 in.
Part FitmentDirect Fit
Vendor Part Number817808
Package Qty1
Package TypeEA
No Questions
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