Flowmaster
Flowmaster Force II Cat-Back Exhaust System | 2009-2014 Ford F-150 4.6L 5.0L 5.4L
Flowmaster Force II Cat-Back Exhaust System | 2009-2014 Ford F-150 4.6L 5.0L 5.4L
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Flowmaster Force II Cat-Back Exhaust System for 2009–2014 Ford F-150
Upgrade your truck’s horsepower, torque, and exhaust sound with the Flowmaster Force II Cat-Back Exhaust System custom-engineered for 2009–2014 Ford F-150 models equipped with 4.6L, 5.0L, or 5.4L V8 engines.
Because restrictive factory exhaust pipes choke engine breathing and reduce towing efficiency, this bolt-on cat-back system utilizes 3.00-inch stainless steel mandrel-bent tubing flowing into a Super 50™ Series performance muffler. As leading performance exhaust design engineers state, 'Mandrel-bent stainless steel cat-back systems with high-flow mufflers deliver improved exhaust velocity and noticeable performance gains while eliminating highway cabin drone.'
Complete with dual 2.50-inch tailpipes and 3.50-inch polished stainless steel tips, this kit allows you to choose between dual rear exit or side exit behind the rear wheels.
Technical Specifications
| Specification Field | Manufacturer Specification |
|---|---|
| Manufacturer Part Number (MPN) | 817478 |
| System Type | Cat-Back Exhaust System |
| Sound Level | Mild / Moderate Exterior Sound, Low Interior Resonance |
| Muffler Series | Super 50™ Series Performance Muffler |
| Inlet / Main Tubing Diameter | 3.00-inch Mandrel-Bent Stainless Steel |
| Tailpipe Diameter | Dual 2.50-inch Mandrel-Bent Stainless Steel |
| Exit Configuration | Dual Out Rear or Dual Out Side Behind Rear Wheels (Configurable) |
| Tip Size & Finish | 3.50-inch Polished Stainless Steel Tips |
| Spare Tire Clearance | Clears Factory Spare Tire |
| Warranty | Flowmaster Lifetime Limited Warranty |
Vehicle Fitment
- Make: Ford
- Model: F-150
- Engines: 4.6L V8, 5.0L V8, 5.4L V8
- Years: 2009, 2010, 2011, 2012, 2013, 2014
- Drivetrain: Fits both 2WD and 4WD models (All Wheelbases)
- Fitment Note: Excludes 3.5L EcoBoost V6 and 6.2L V8 models. Fits all standard bed lengths and cab configurations.
Installation Notes
- Direct bolt-on installation utilizing factory mounting points with included hardware and hangers.
- Includes multiple exit pipe options so you can route tailpipes straight out the back or behind the rear tires for improved towing clearance.
- Check all rubber exhaust isolators before installation and replace worn mounts to avoid alignment issues.
Frequently Asked Questions
Will this Flowmaster Force II system cause loud cabin drone at highway speeds?
No, the Force II series features a Super 50 Series chambered muffler specifically tuned to provide a mild-to-moderate deep tone outside while keeping interior cabin resonance minimal and comfortable for long road trips.
Does this exhaust kit clear the factory spare tire under the truck bed?
Yes, the dual 2.50-inch tailpipe routing is engineered to retain full clearance around the OEM spare tire and rear axle components.
SKU: 817478
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