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Flowmaster Force II Cat-back Exhaust System

2005-2007 Ford F-250/F-350 Super Duty trucks with 5.4L or 6.8L engines.

PART# 817422

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Moderate to mild sound


This Flowmaster® Force II cat-back exhaust system fits all 2005-2007 Ford F250 and F350 Super Duty trucks with either the 5.4L V8 or 6.8L V10 engines. The 3.00-inch mandrel-bent stainless steel exhaust system features a 70 Series™ "Big Block II" performance muffler for a mild interior tone and moderate exterior sound level. Perfect for trucks used for work or extended towing, this full 409S stainless system is engineered for maximum efficiency and performance gains, as well as a lifetime of durability. The system exits in the factory location behind the rear tire which is preferable when towing boats and trailers. The large tailpipe utilizes the factory hanger locations for a quick and easy installation and includes a large 3.50-inch polished stainless steel exhaust tip embossed with the Flowmaster logo. Comes complete with detailed installation instructions, all necessary hardware and is backed by our Lifetime Limited Warranty. Notes: Fits 2 and 4 wheel drive models and all wheelbases.


  • Includes Hangers and Hardware for an Easy Installation
  • Large 3.50-inch Polished 304 Stainless Steel Tip
  • Mandrel-bent 16-gauge Stainless Steel Tubing
  • 70 Series "Big Block II" Performance Muffler
  • Connects After Factory Catalytic Converter
  • Mild to Moderate Exterior Exhaust Tone
  • Uses the Factory Hanger Locations
  • Lifetime Limited Warranty
  • Easy Installation


Emission Code5
Exhaust SeriesForce II
Exit PositionSingle Side Exit
Heat ShieldNo
Inlet Diameter (in)3
Material409 Stainless Steel
Muffler Part NumberKit Only
Muffler Quantity1
Muffler Series70 Series Big Block
Outlet Diameter (in)3
Product TypeExhaust System
Single DualSingle
Sound LevelModerate/Mild
System TypeCat-back
Tip Diameter (in)3.5
Tip Quantity1
Tubing Diameter (in)3
California Proposition 65 Chemical NameChromium (hexavalent compounds)
Nickel (Metallic)
California Proposition 65 RequiredYes
Part Number817422



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.

Tech Resources

Fits 2005-2007 Ford F-250 and F-350 Super Duty trucks with 5.4L or 6.8L engines. Fits 2 and 4 wheel drive models and all wheelbases.


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