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Flowmaster 717978 FlowFX Extreme Cat-Back Exhaust Kit 3 Inch 409 Stainless Steel Compatible with 2015-2020 Ford F-150 2.7L 3.5L 5.0L engines

4.4 (7) Write Review
Free shipping on orders over $29.99

$398.95

$ 99 .00 $99.00

In Stock

About this item

  • FlowFX series performance muffler offers a deep powerful sound and increased performance
  • 409 stainless steel construction delivers extra durability and improved long-term corrosion resistance
  • Max dyno gains of 18 HP and 9 LB.FT torque over stock at the rear wheels
  • Uses factory hanger locations for easy installation
  • 3.0-inch 16-gauge mandrel bent stainless steel tubing helps maintain maximum exhaust flow for better power


Flowmaster 717978 FlowFX Extreme Cat-Back Exhaust System - 3.0" - 409S Stainless Steel


Hardcore
Reviewed in Canada on March 20, 2025
EASY TO INSTALL. I CUT TAIL PIPE OFF AT MUFFLER AS I WASN'T KEEPING STOCK EXHAUST. IF YOU PLAN ON KEEPING STOCK EXHAUST (IN ONE PIECE) TRUCK WILL NEED TO BE JACKED UP OFF GROUND FOR SURE OR A HOIST WOULD HELP. EXHAUST SYSTEM IS GREAT!! NICE DEEP RUMBLE THAT ISN'T TOO OFFENSIVE BUT BRINGS THE 5.0 L TO LIFE. HAVENT NOTICED ANY DROAN AT ANY SPEED.
Johnathon Coggins
Reviewed in the United States on February 12, 2025
If you're just looking for a little noise and rumble, this will do it. It has a decent tone and isn't very loud at low rpm but gets a little raspy and crackly at upper end. Fits great and seems to be decent quality. Only had it on for about 4 months. Will update if it falls apart sooner than expected.
Troy P
Reviewed in the United States on April 26, 2024
Love this exhaust, it is very aggressive, I had to cut mine due to adding a 3' electric dump. Gets louder and more aggressive as you have it.
Kev O
Reviewed in the United States on March 19, 2023
I paid $10 for fast shipping..it came a day later then expected so this company refunded me the $10 right away .. I wish all companies would have great service like this one does!Read a review here saying it's a nice deep sound that's not too loud..???This thing is very loud "to me" anyways ...Installed easy, and product looks great. Company was great to work with, but if I knew this was going to be this loud I would have passed on this model.Flowmaster has always made great stuff just not sure if I'll get use to this one ..
shawn redinger
Reviewed in the United States on April 22, 2023
Twice as loud as stock at idle,super easy to install did it in the driveway in about an hour
ruben cardona jr
Reviewed in the United States on April 17, 2023
The installation is really easy and quick. Only takes about an hour to install. Sounds great on my 2018 F-150 Definitely recommend this product.
David Lucas
Reviewed in the United States on December 20, 2022
2020 F150, very easy and simple to install. Deep sound and not too loud. Love the fit and sound.