




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.
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Vehicle Fitment
Physical products 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.
Digital Products, such as MPT Tunes and HP Tuners Credits, are not covered by this.
Please see our Refund Policy or contact an MPT Expert for more information.
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 all orders outside the contiguous US, with the buyer being 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 the order. We use all major carriers, including USPS, FedEx, UPS, and DHL.
Items not stocked at our location may incur additional lead-time or charges.
Please our Shipping Policy for more information.


Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1986) is a California law that applies to all companies selling products in California. Proposition 65 requires warnings if a product contains any listed chemical present above very low levels that are known to cause cancer, birth defects or other reproductive harm. Proposition 65’s warning standards are among the most stringent in the world. Proposition 65 is not a product safety law, but rather a “right-to-know” law. Businesses are required to provide warnings to comply with Proposition 65. These warnings are required to be in place for all products offered for sale in California.
There are over 800 chemicals on the Proposition 65 list, which is administered by California's Office of Environmental Health Hazard Assessment (OEHHA), a part of the California Environmental Protection Agency. The list includes naturally occurring and man-made chemicals. Proposition 65 warnings can be seen for a wide variety of everyday consumer products, including Automotive Performance products, and warnings can be seen posted throughout California in a variety of establishments such as hotels, restaurants, automobile dealerships/repair shops, and retail stores just to name a few.
To comply with the requirements of Proposition 65, this warning is present on all products sold by MPT.
More detailed information can be found by going to:
https://www.p65warnings.ca.gov/
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
Benefits
Product Specifications
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
For questions about this product or to report product description inaccuracies, contact the MPT Performance experts at (407) 636-7077 or by email.
MPT is proud to offer free shipping on most orders over $149.
Turnaround Times:
Special Considerations:
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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I wanted try this tune to smoothen out my clunky 10 speed transmission. It would shift hard from 3-5 and I tried everything from taking it to Ford to resetting the tables. I am really easy on my truck and didn’t need the performance, so I got the tow tune for 87 octane. My transmission is now silky smooth going through all gears. I love it! I also got the pesky auto/start/stop disabled. Can’t really speak to the performance as that’s not what I was going for. Still the fastest vehicle I’ve ever owned and now with a silky smooth transmission.
I was looking to unlock the full potential of my 2022 3.5L Ecoboost and MPT knocked it out of the park. The preformance of my truck is unreal. I have friends that can’t believe how much more power my truck has after using MTP.
If you have any questions about anything, MPT has a great line of people to guide you through what ever you need. Highly recommended
Decided to upgrade my turbos on my 25’ Ford Raptor and went back to MPT to get the most power out of my new setup! Customer service has been great! Responds quickly and listens to all my questions/concerns! Couldn’t be happier with the results so far!
I chose MPT because of the wide variety of reviews and recommendations from some friends. And needless to say i am not disappointed. MPT tunes has been amazing for my truck. I’m running 35’s on my stock 2.7 ecoboost. My 0-60 was 8.56 seconds before and my 20-60 was 6.38 before after the tune my 0-60 was 7.21 and my 20-60 was 5.10 it’s a lot faster and it feels like there’s more power in general. I am very happy!
I had to see what all the hype was about, and let me tell you—this has completely transformed my truck. I went with the 87 Daily/Tow tune, and it woke my truck up beautifully. It cleaned up the shifts so much that I now feel comfortable driving it on my daily commute without worrying about exploding the transmission. I also got the E85 PR-X, and all I can say is I’m speechless at how fast the truck is now.