Flowmaster® (85-04) Mustang V8 409SS Outlaw Cat-Back System
Flowmaster® (85-04) Mustang V8 409SS Outlaw Cat-Back System
Flowmaster® (85-04) Mustang V8 409SS Outlaw Cat-Back System
Flowmaster® (85-04) Mustang V8 409SS Outlaw Cat-Back System


Flowmaster® (85-04) Mustang V8 409SS Outlaw Cat-Back System

Regular price$560.95
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Compatible: (4.6L/5.0L)

1985 - 2004 Ford Mustang 


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.


Flowmaster's race-oriented Outlaw® Extreme Cat-back system is designed for the enthusiast looking for the maximum sound level and performance from their 1986-2004 Mustang GT, LX and Cobra models with either a 4.6L or 5.0L engine. The turn-down tailpipes drop at the rear of the transmission and eliminates full length tailpipes to maximize the sound level and allow for extra clearance for wide tires and modified suspensions. This mandrel-bent system is designed to mount behind the factory catalytic converters, or most OEM style aftermarket H-pipes. The Outlaw Extreme system delivers a super aggressive interior and exterior tone and is suited to the enthusiast who wants the most aggressive components they can purchase. Like all Flowmaster® systems, the benefits include improved throttle response and power. Designed for an easy fit, these systems include all necessary parts and hardware for easy installation. Note: Ideal for off-road racing use.


  • Dyno Tuned for Maximum Performance
  • True Dual System with Turndowns
  • Race Proven Outlaw Mufflers
  • Stainless Steel Construction
  • Lifetime Limited Warranty
  • Flowmaster Quality


Brand Flowmaster
Catalytic Converter Included No
Emission Code 5
Exhaust Series Outlaw Extreme
Exit Position Dual Out Dumps
Heat Shield No
Material 409 Stainless Steel
Mount Type Uses Factory Hangers
Muffler Finish Stainless Steel
Muffler Inlet Diameter (in) 2.5
Muffler Outlet Diameter (in) 2.5
Muffler Part Number Kit Only
Muffler Quantity 2
Muffler Series Outlaw
Muffler Shape Round
Muffler Type Welded Baffle
Product Type Exhaust System
Single Dual Dual
Sound Level Aggressive
System Type Cat-back
Tip Cut Square
Tip Diameter (in) 2.5
Tip Edge Style Cut
Tip Finish Natural
Tip Length (in) 6
Tip Material Stainless Steel
Tip Quantity 2
Tip Shape Round
Tubing Diameter (in) 2.5
California Proposition 65 Chemical Name Chromium (hexavalent compounds)
Nickel (Metallic)
California Proposition 65 Required Yes
Part Number 817682

Install Guide:




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