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Flowmaster Force II Cat-back Exhaust System

Fits 2008-2013 Ford F-250/F-350 Super Duty with V8 or V10 gas engine.

Part # 817505 Be the first to write a review
Estimated shipping date: 02/25/2022
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The Force II® Cat-back exhaust system for 2008-2013 Ford F-250/F-350 Super Duty trucks with a V8 or V10 gas engine is perfect for the person looking for mild to moderate sound levels with all of the performance benefits that you would expect from Flowmaster®. This bolt-on emissions-legal system features a 50 HD Series™ performance muffler with large 4.00-inch internals and dual mandrel-bent 2.50-inch 409 stainless steel tailpipes for maximum performance and a deep powerful sound. The system comes with your choice of tailpipe exits and can be configured for either straight out the back under the rear bumper for a muscular look, or out the sides behind the rear wheels which is ideal for towing. The tailpipes are finished off with a pair of large 3.50-inch polished 304 stainless steel tips and is covered by our Lifetime Limited Warranty. Designed for an easy fit, this system includes all necessary parts and hardware for easy installation you can do at home.


  • Includes Hangers and Hardware for an Easy Installation
  • Dual 3.50-inch Polished 304 Stainless Steel Tips
  • Mandrel-bent 16 Gauge Stainless Steel Tubing
  • Uses the Factory Hanger Locations
  • 50 HD Series Performance Muffler
  • Connects After Factory Resonator
  • Moderate Sound Exterior Tone
  • Quick and Easy Installation
  • Lifetime Limited Warranty
  • Flowmaster Quality

About Flowmaster

Flowmaster® is a household name, and for good reason. They've built legendary exhaust systems and mufflers for decades, and now offer performance air intakes, catalytic converters, and headers to give your hot rod performance to match the iconic Flowmaster sound.

Brand Flowmaster
Emission Code5
Exhaust SeriesForce II
Exit PositionDual Out Rear / Dual Out Side
Heat ShieldNo
Inlet Diameter (in)3
Material409 Stainless Steel
Muffler Part NumberKit Only
Muffler Quantity1
Muffler Series50 Series HD
Outlet Diameter (in)3
Product TypeExhaust System
Single DualDual
Sound LevelModerate
System TypeCat-back
Tip Diameter (in)3.5
Tip Quantity2
Tubing Diameter (in)3
California Proposition 65 Chemical NameChromium (hexavalent compounds)
Nickel (Metallic)
California Proposition 65 RequiredYes
Part Number817505

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 2008-2013 Ford F-250/F-350 Super Duty with V8 or V10 gas engine.

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