09-10 Ford F-150 4.6L & 5.4L / 11-14 Ford F-150 5.0L V8 Flowmaster 817509 Force II Cat-back Exhaust System

Flowmaster 817509 Force II Cat-back Exhaust System

Part Number: 817509

The Flowmaster 817509 Force II Cat-back Exhaust System is designed for 2009-2014 Ford F-150 trucks equipped with the 4.6L, 5.0L, or 5.4L engine. This performance exhaust upgrade delivers the legendary Flowmaster sound with a moderate exterior tone and mild interior sound level, making it an excellent choice for truck owners seeking improved exhaust flow, enhanced throttle response, and a more aggressive appearance without excessive cabin noise. Featuring a Super 50 Series muffler, Delta Flow Technology, and durable stainless steel construction, this bolt-on system is especially recommended for towing applications and daily-driven trucks that need dependable performance.

The Force II system replaces the factory exhaust after the catalytic converter and uses mandrel-bent tubing to improve exhaust efficiency while maintaining excellent fitment. The large 3.50-inch polished stainless steel exhaust tip adds a custom look, while the single-exit design provides a clean appearance and a deep, refined Flowmaster exhaust note. The system includes necessary clamps, hangers, and hardware for a straightforward installation using factory hanger locations.

Key Features

• Flowmaster Force II cat-back exhaust system designed for Ford F-150 trucks
• Super 50 Series performance muffler for a smooth, moderate exhaust tone
• Delta Flow Technology helps reduce interior drone while maintaining performance sound
• All stainless steel construction for long-lasting durability and corrosion resistance
• 3.00-inch mandrel-bent exhaust tubing for improved exhaust flow
• Large 3.50-inch polished 304 stainless steel exhaust tip for a premium appearance
• Single side exit exhaust design with a clean factory-style fit
• Uses factory hanger locations for easier installation
• Designed for towing, street performance, and daily driving applications

Benefits

• Improves exhaust flow to help support better throttle response and overall engine performance
• Provides a deeper Flowmaster exhaust sound without an overly aggressive cabin experience
• Enhances the appearance of the truck with a polished stainless steel exhaust tip
• Offers durable performance with corrosion-resistant stainless steel materials
• Maintains a comfortable driving experience with reduced interior exhaust resonance
• Provides a direct-fit upgrade with included hardware for easier installation
• Backed by Flowmaster's Lifetime Limited Warranty for long-term confidence

Product Specifications

• Brand: Flowmaster
• Part Number: 817509
• Product Type: Cat-back Exhaust System
• Exhaust Series: Force II
• Sound Level: Moderate exterior / mild interior tone
• Material: 409 Stainless Steel piping and muffler body
• Exhaust Tip Material: Polished 304 Stainless Steel
• Pipe Diameter: 3.00 inches
• Inlet Diameter: 3.00 inches
• Tail Pipe Outlet Diameter: 3.00 inches
• Exhaust Tip Diameter: 3.50 inches
• Exhaust Exit Style: Single side exit
• Muffler Series: Super 50 Series
• Muffler Quantity: 1
• Finish: Natural stainless steel with polished exhaust tip
• Color: Silver stainless steel piping
• Clamping Type: Flat band clamps
• Clamps Included: Yes
• Hangers Included: Yes
• Catalytic Converter Included: No
• Drive Compatibility: 2WD and 4WD
• Valve Included: No
• UPC: 700042024988

Install Difficulty level

This Flowmaster 817509 exhaust system is designed for an easy bolt-on installation using common hand tools and factory hanger locations. Installation requires light mechanical skill and can typically be completed in approximately 2 hours, making it a manageable upgrade for experienced DIY installers or professional shops.

Vehicle Fitment

• 2009-2010 Ford F-150 with 4.6L V8 engine
• 2011-2014 Ford F-150 with 5.0L V8 engine
• 2009-2010 Ford F-150 with 5.4L V8 engine
• Fits 2-wheel drive and 4-wheel drive models
• Fits all wheelbases

For questions about this product or to report product description inaccuracies, contact the MPT Performance experts at (407) 636-7077 or by email.