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Flowmaster

Flowmaster Force II Cat-back Exhaust System

Part # 17203 Be the first to write a review

1986-1993 Ford Mustang LX with 5.0L engine and 1986 GT with 5.0L engine. - Moderate sound

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Flowmaster Force II Cat-back Exhaust System

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Free Shipping - Lower 48 US States

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Est. Ship Date: 08/17/2026

$899.95
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Our Force II® exhaust system for 1987-1993 Ford Mustang LX and 1986 GT models with the 5.0L engine is a bolt-on emissions legal system featuring free-flowing 2.50-inch aluminized steel mandrel-bent inlet pipes, aluminized steel tailpipes and uses the factory hanger locations for quick and easy installation. This Flowmaster® exhaust system comes with a pair of 50 Series™ Delta Flow® mufflers with heat shields and the sound to complement that iconic deep and powerful Fox body 5.0L engine. The system is then finished off with a pair of long 2.50-inch polished 304 stainless steel tips for that show car look. Comes with all necessary hardware and easy to follow instructions. Note: Fits coupes and convertibles. Also fits 1986 Ford Mustang GT models with 5.0L engine.

Features:

  • Includes Hangers and Hardware for Easy Installation
  • Pair of 50 Series Delta Flow Performance Mufflers
  • Mandrel-bent 16 Gauge Aluminized Steel Tubing
  • Polished 304 Stainless Steel Tailpipe Tips
  • Dyno Tuned for Maximum Performance
  • Moderate Exterior Exhaust Tone
  • 3-year Limited Warranty
  • Minimal Interior Sound
Brand Flowmaster
California Proposition 65Yes
CARB (California) CompliantYes
Catalytic Converter IncludedNo
Catalytic Converter Quantity0
CategoryExhaust
Clamping TypeFlat Band
Clamps IncludedYes
Drive2WD
Emission Code5
Exhaust SeriesForce II
Exhaust Tip ColorSilver
Exhaust Tip ConnectionWelded
Exhaust Tip CutAngled
Exhaust Tip Diameter2.50 IN
Exhaust Tip EdgeSlash Cut
Exhaust Tip FinishPolished
Exhaust Tip IntercooledNo
Exhaust Tip Length25.00
Exhaust Tip Material304 Stainless Steel
Exhaust Tip Quantity2
Exhaust Tip ResonatedNo
Exhaust Tip ShapeRound
Exhaust Tip WallSingle Wall
Exit StyleDual Out Rear
FinishAluminized
Gasket Or Seal IncludedNo
Grade TypePerformance
Hangers IncludedYes
Heat Shield IncludedNo
Inlet Diameter2.50 IN
Inlet TypeFlanged
Main Piping Diameter2.50 IN
Mounting Bracket IncludedYes
Muffler (Left) Body Height4.00 IN
Muffler (Left) Body Length17.25 IN
Muffler (Left) Body Width9.50 IN
Muffler (Left) TypeChambered
Muffler (Right) Body Height4.00 IN
Muffler (Right) Body Length17.25 IN
Muffler (Right) Body Width9.50 IN
Muffler (Right) TypeChambered
Muffler Body MaterialAluminized Steel
Muffler Body ShapeOval
Muffler FinishBlack High-Temperature Paint Finish
Muffler Flanged InletYes
Muffler Flanged OutletNo
Muffler IncludedYes
Muffler Inlet ConnectionFemale Ball
Muffler Inlet Inside Diameter2.50 IN
Muffler Inlet Outside Diameter2.63 IN
Muffler Outlet ConnectionSlip-Fit
Muffler Outlet Quantity1
Muffler Part NumberKit Only
Muffler Quantity2
Muffler Series50 Series Delta Flow
Muffler TypeChambered
part typeExhaust System
Pipe ColorSilver
Pipe MaterialAluminized Steel
Product TypeExhaust System
Sound LevelModerate
Spring Bolt Kit IncludedNo
Sub CategoryExhaust and Tail Pipes
Tail Pipe Outlet Outside Diameter2.50 IN
Tail Pipe Quantity2
Dual
Tail Pipe Tapered OutletNo
TypeCat-Back
Valve IncludedNo
Valve TypeNot Applicable
UPC700042011179
California Proposition 65 Chemical NameChromium (hexavalent compounds)
Nickel (Metallic)
Part Number17203
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 - 17203_instructions.pdf
Instructions - Flowmaster Warranty 26 Update.pdf
Fits 1986-1993 Ford Mustang, LX with a 5.0L engine and 1986 GT with 5.0L engine. Fits Coupes and Convertibles.

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