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09-10 Ford F-150 4.6L & 5.4L / 11-14 Ford F-150 5.0L V8 Flowmaster 817478 Force II Cat-back Exhaust System

The Flowmaster 817478 Force II Cat-back Exhaust System upgrades 2009-2014 Ford F-150 trucks with improved exhaust flow, a moderate performance tone, and a premium dual exhaust appearance. Featuring a Super 50 Series muffler, stainless steel construction, and bolt-on installation, this system delivers reliable performance, durability, and enhanced styling for daily driving or towing applications.

Top Features

  • Designed for 2009-2014 Ford F-150 trucks with 4.6L, 5.0L, and 5.4L engines.
  • Super 50 Series chambered muffler provides a moderate exterior exhaust sound.
  • 3.00-inch mandrel-bent stainless steel inlet tubing improves exhaust flow.
  • Dual 2.50-inch mandrel-bent tailpipes provide balanced performance.
  • Includes polished 3.50-inch 304 stainless steel exhaust tips for a custom appearance.
  • Available with dual rear exit or dual side exit configurations.
  • Uses factory hanger locations for simplified bolt-on installation.
  • Includes hangers and hardware for a complete installation.
  • Designed to clear the factory spare tire.
  • Backed by Flowmaster’s Lifetime Limited Warranty.

Vehicle Fitment

  • 2009-2010 Ford F-150 4.6L engine
  • 2011-2014 Ford F-150 5.0L engine
  • 2009-2010 Ford F-150 5.4L engine
  • Fits 2-wheel drive and 4-wheel drive models
  • Fits all wheelbases
Vendor: Flowmaster
SKU: FLO817478
Availability: 3 In Stock
$ 1,249.95 USD
On-Sale $ 1,249.95 USD
Normally $ 1,249.95 USD
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UPC: 700042023677
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Flowmaster 817478 Force II Cat-back Exhaust System

The Flowmaster Force II Cat-back Exhaust System is designed for 2009-2014 Ford F-150 trucks equipped with 4.6L, 5.0L, or 5.4L engines. This performance exhaust system delivers a refined moderate exterior exhaust tone with a comfortable interior sound level, making it an excellent choice for truck owners who want improved exhaust flow, enhanced styling, and a classic Flowmaster sound without excessive cabin noise. The bolt-on design uses factory hanger locations and includes the required hangers and hardware for a straightforward installation. Featuring a Super 50 Series chambered muffler, mandrel-bent stainless steel tubing, and dual polished exhaust tips, this cat-back system provides improved exhaust performance while maintaining daily driving comfort. The system offers two tailpipe exit options, including dual rear exit for a bold appearance or dual side exit behind the rear wheels for towing applications.

Key Features

  • Complete cat-back exhaust system engineered specifically for 2009-2014 Ford F-150 trucks.
  • Super 50 Series chambered performance muffler provides a moderate exhaust tone.
  • Mandrel-bent 16-gauge 409 stainless steel tubing improves exhaust flow and durability.
  • 3.00-inch inlet tubing supports strong exhaust performance.
  • Dual 2.50-inch mandrel-bent tailpipes provide balanced exhaust flow.
  • Large 3.50-inch polished 304 stainless steel exhaust tips enhance appearance.
  • Dual rear exit and dual side exit configurations provide styling and towing flexibility.
  • Designed to clear the factory spare tire.
  • Uses factory hanger locations for a clean installation.
  • Dyno tuned for performance and sound quality.

Benefits

  • Improves the appearance of the Ford F-150 with a premium dual exhaust look.
  • Provides a deeper, more aggressive exhaust note while maintaining comfortable interior sound levels.
  • Enhances exhaust flow for improved performance characteristics.
  • Offers durable stainless steel construction designed for long-term reliability.
  • Includes installation hardware and hangers for a convenient bolt-on upgrade.
  • Covered by Flowmaster’s Lifetime Limited Warranty for added confidence and protection.

Product Specifications

  • Brand: Flowmaster
  • Part Number: 817478
  • Product Type: Cat-back Exhaust System
  • Exhaust Series: Force II
  • Sound Level: Moderate
  • Material: 409 Stainless Steel tubing and muffler body
  • Exhaust Tip Material: 304 Stainless Steel
  • Exhaust Tip Finish: Polished
  • Exhaust Tip Color: Silver
  • Exhaust Tip Size: 3.50-inch round angle-cut tips
  • Main Pipe Diameter: 3.00 inches
  • Tail Pipe Diameter: 2.50 inches
  • Muffler Series: Super 50 Series
  • Muffler Type: Chambered
  • Muffler Body Dimensions: 17.25 inches length x 10 inches width x 5 inches height
  • Muffler Finish: Black high-temperature paint finish
  • Exit Style: Dual rear exit or dual side exit
  • Drive Compatibility: 2WD and 4WD
  • Catalytic Converter Included: No
  • Clamps Included: Yes
  • Hangers Included: Yes
  • CARB Status: California compliant

Install Difficulty level

This Flowmaster Force II Cat-back Exhaust System is designed for an easy bolt-on installation using factory mounting locations, included hangers, and supplied hardware. Installation can typically be completed with basic hand tools, and the shortest referenced installation time is approximately 1 hour.

Vehicle Fitment

  • 2009-2010 Ford F-150 with 4.6L engine
  • 2011-2014 Ford F-150 with 5.0L engine
  • 2009-2010 Ford F-150 with 5.4L 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.

Shipping Policy

MPT is proud to offer free shipping on most orders over $149.

  • Free shipping applies only to the contiguous United States. Shipping and handling charges will apply to orders outside the contiguous US, and the buyer is responsible for any duty fees or taxes their home country may charge to import goods.
  • With free shipping, we will choose the best shipping method for your order. We use all major carriers, including USPS, FedEx, UPS, and DHL.

Turnaround Times:

  • MPT Tunes have a standard turnaround time of 2-3 business days, beginning once we receive your MPT Tune Form.
  • We do not process orders on weekends or observed holidays, which do not count as business days.
  • Physical items that are in stock at MPT and ordered by 4PM EST will be shipped the same day. Orders placed after 4PM EST will be processed on the following business day.

Special Considerations:

  • Items not stocked at our location will follow the same processing times but may experience lead-time delays and could incur additional charges. Shipping methods may vary for these items based on what was paid and the requested delivery speed. If you need an item by a specific deadline, please contact an MPT Expert.
  • SCT Tuner Orders with the Prioritized Order option must have their tune forms submitted by 3PM EST to be completed the same day. Forms submitted after this time will be processed the next business day.
  • Orders will ship to the billing address listed on your order. If paying by credit or debit card, we can only ship to the billing address. Contact an MPT Expert for assistance if you need a different shipping address.

MPT Performance Returns and Refund Policy

A Return Authorization Number is required for all returns. Please contact an MPT Expert to obtain an RA # before sending anything back to us for any reason.

MPT tuning charges and license fees are Non-Refundable. The sale is final when MPT has sent the tune file over email. This includes both new tune purchases and tune updates.

Products other than MPT tunes, digital products, and MPT decals may be returned within 30 days for any reason, provided that the product has not been installed and is in brand new, unused condition with the original packaging. Once a product has been installed it is non-refundable. We reserve the right to deny the return, should the product be received and it display signs of installation or unmentioned damage.

For vehicle programmers/tuners, the vehicle must be returned to stock if a program was installed. If a tuning device is returned and has not been returned to stock, a refund will not be issued, and your tuner will not be sent back without a shipping and handling fee.

The customer is responsible for all shipping charges incurred during the return process.

Amount Refunded:
•Returns post marked before 30 days from the date the item was received will be refunded the purchase price, minus a 25% restocking fee and the cost of shipping.
After 30 days, all sales are Final.
•Shipping charges along with any package insurance are non-refundable. If your purchase was shipped with our Free Shipping option, the cost of the shipping will be subtracted from the total refund amount.

HP Tuners Credits are assigned to the HP Tuners product with the submitted serial number and cannot be transferred. Once you load a tune to your vehicle with the RTD, these credits are Non-Refundable.

Digital products and files that have no ability to be taken back physically, such as an SCT Tuner Unlock, are Non-Refundable.

nGauge Tune License Fee is included in your initial purchase of MPT tunes for the nGauge. This fee is factored into the price of the tunes and becomes Non-Refundable when the stock file has been emailed to MPT.

MPT Decals are Non-Refundable, once they have been received by the customer.

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