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Manufacturer information. Check the part number and installation requirements for your vehicle.
Supplier details checked 2026-09-23 · Test catalog
1999-2004 Ford F-250, F-350 trucks Super Duty chassis with a V8 or V10 engine. - Moderate to mild sound
Flowmaster Force II Cat-back Exhaust System
Includes Hangers and Hardware for an Easy Installation
70 Series Big Block II Performance Muffler
Mandrel-bent 16 Gauge Aluminized Tubing
Dyno Tuned for Maximum Performance
Bolt-on Cat-back Exhaust System
Moderate Exterior Exhaust Tone
Uses the Factory Hangers
3-year Limited Warranty
Flowmaster Quality
Fits 1999-2004 Ford F-250 and F-350 truck with a V8 or V10 engine, fits 2 and 4 wheel drive models on 133-inch, 155-inch or 168.4-inch wheelbases.
Flowmaster 99-04 Ford F250/F350 Truck Force II Cat-Back Exhaust System
9904 FORD F250F350 TRK FII
SYS 99-04 FORD F250/
For the person who wants a subtle custom appearance with all the benefits that a Flowmaster® Cat-back exhaust system provides. S.O.S. (Single out side) systems are the perfect choice. Our Force II® systems delivers a moderate exterior tone and mild to moderate interior tone, and are suited to customers looking for efficiency improvements without a lot of noise. The system is constructed from large 3.00-inch aluminized steel tubing flowing into a specially selected 70 Series™ Big Block II muffler™. The 3.00-inch mandrel-bent tailpipe exits out behind the right rear wheel with a slight angle cut at the end of the tubing, leaving you the option of choosing your own style of tip if you desire. Especially recommended for towing applications. Like all Flowmaster systems, the benefits include improved throttle response, power and mileage. Designed for an easy fit, these systems include all necessary parts and hardware for easy installation. Notes: Fits 2/4 wheel drive models on 133-inch, 155-inch or 168.4-inch wheelbases.
SYS 99-04 FO
