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Flowmaster

Flowmaster 717864 FlowFX Cat-Back Exhaust Kit 3 Inch 409 Stainless Steel 4.5 Inch Black Ceramic Coated 304 Stainless Steel Tip Compatible with 2009-2014 Ford F-150 3.5L Ecoboost 4.6L 5.0L 5.4L

  • Based on 22 reviews
Condition: New
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$538.95 Why this price?
4th of July Sale · 7% off was $579.99

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Availability: In Stock.
Fulfilled by Amazon
Arrives Saturday, Jul 11
Order within 23 hours and 6 minutes
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Features

  • Large 4.50-Inch Black Ceramic Coated Stainless Steel Tips
  • Deep Powerful Tone Inside and Outside the Vehicle
  • Flow FX "Straight-through" Performance Muffler
  • Mandrel-bent Stainless Steel Tubing
  • Uses the Factory Hanger Locations
  • Includes All Necessary Hardware
  • Quick and Easy Installation
  • Lifetime Limited Warranty

Description

Exhaust System, FlowFx, Cat-Back, 3 in Diameter, Single Side Exit, 4.5 in Black Ceramic Tip, Stainless, Natural, Kit

Color: Multicolor


Brand: Flowmaster


Material: Plastic


Automotive Fit Type: Vehicle Specific Fit


Manufacturer: Flowmaster


Brand Name: Flowmaster


Manufacturer Part Number: 717864


Manufacturer: Flowmaster


UPC: 700042039364


Global Trade Identification Number: 64


OEM Equivalent Part Number: 717864


Part Interchange Info: 717864


Model Number: 717864


Unit Count: 1.0 Count


Manufacturer Warranty Description: Lifetime Limited


Item Weight: 43.5 Pounds


Included Components: Exhaust System


Item Type Name: Exhaust System


Automotive Fit Type: Vehicle Specific Fit


Color: Multicolor


Material Type: Plastic


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Jul 11

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Good for the money
Good exhaust, not nearly as loud as my Roush exhaust that I had to replace, sounds good on 5.0, waste on v6 for sound. I did spray hi temp paint on all so hopefully lasts a bit longer than the other. Will fit all cab/box sizes for same year.
Reviewed in the United States on November 15, 2025 by Robert
    • Love that exhaust note!
This was one of the best exhaust kits I've ever worked with. Everything went together as shown, all the factory hangers were there and fit the stock locations, and I was done in a couple of hours! Highly recommend this kit from Flowmaster!
Reviewed in the United States on December 12, 2024 by Timeless
    • Great quality exhaust system with less sound dampening than expected Great quality exhaust system with less sound dampening than expected
Review Image by Ryan K
Bought this for my 2010 5.4 after the factory muffler finally gave up. Love the quality of the kit, and the install was dead simple. Took me less than 30 minutes and everything fit perfectly into the factory exhaust hangers. Dropping a star because the exhaust tone is definitely not “mellow.” It’s acceptable at idle, but drones annoyingly loud in the cab at about 1800 rpm with any load on the engine. Fine at highway speeds until you hit a hill or need to pass and suddenly can’t hear your music anymore. That said, does sound amazing at WOT, and I did notice an improvement in mpg. ... show more
Reviewed in the United States on May 26, 2026 Reviewed in the United States on May 26, 2026 by Ryan K
    • No mods required for installation.
Easy install no torch required for install. All hardware was included to complete the job for my truck. The sound is mellow. Not too loud, unless you stomp on the gas and let her wind up. Makes the old Coyote nice and throaty sounding when the cam phasers kick in. Recommended over more expensive brands, way cheaper than oem. ... show more
Reviewed in the United States on May 30, 2025 by NY411
    • Flowmaster FX exhaust not mellow sound
Install was straight forward, relatively easy. My only dislike is that the exhaust is loud. The reviews all said it had a mellow tone. Well not mine, there is zero baffles in the muffler. Shame on me for not looking further into it before ordering. Truck is actually louder than before install and there are no leaks now. ... show more
Reviewed in the United States on February 18, 2026 by Ronni Ettline
    • Missing parts
Kit was missing the first section of exhaust pipe but I was in a pinch and forced to install what was provided. All parts were scratched and some dented.
Reviewed in the United States on November 25, 2025 by Carrie
    • Best exhaust for 2011 Ford F150 5.0
1 month in sounds amazing was very easy to install
Reviewed in the United States on August 3, 2025 by Emiliano corona
    • Sounds great..
It was exactly what I was looking for, it has a nice rumble while accelerating but idling through my neighborhood at 6 am it’s not waking the dead… if your looking for loud and aggressive this isn’t what your looking for..not raspy like a lot of exhaust for the 5.0..
Reviewed in the United States on December 26, 2025 by Sondra

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