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Flowmaster American Thunder Dual Exhaust System - Side/Rear Exit (15-19 2.7L EcoBoost F-150)

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Features & Details

  • Aggressive Flowmaster 40-Series Delta Flow Sound
  • Durable 409 Stainless Steel Construction
  • 3 in. Inlet, Dual 2.5 in. Outlet Mandrel-Bent Tubing
  • 3.5 in. Polished Stainless Steel Tips
  • Simple Bolt-On Installation
  • Choice of Side or Rear Exit
  • Made in the USA
  • Fits 2015-2019 2.7L EcoBoost F-150s, Except for Regular Cabs with a 6.5 ft. Bed
Signature Sound. Pound out a rhythm with the American Thunder Cat-Back Exhaust System built by AmericanMuscle. This Flowmaster American Thunder includes mandrel bent tubing to help improve the truck’s sound. Let them know you’re coming with a mellow, throaty exhaust roar.

Peak Performance. The mandrel bent tubing combined with the Super 40 Series Delta Flow American Thunder muffler gives the system the best possible performance. The reduction of restrictions with this system gives the truck more torque and horsepower. This Cat-Back system gives you a noticeable difference in performance.

Quality Construction. This system was proudly constructed in the United States. The Flowmaster American Thunder Cat-Back Exhaust includes durable 3.0 inch inlets with dual 2.5 outlets and 16 gauge 409 stainless steel tubing. It is known for its corrosion-resistant abilities, and includes the “Flowmaster” logo on the tips for added class and custom styling.

Ease of Installation.The Flowmaster professionally engineered kit was created to be a direct replacement for the stock system. This means that all the necessary hardware comes with the kit, and the only tools necessary are the basic hand tools. No modifications are necessary.

Application.This Flowmaster American Thunder Cat-Back Exhaust System is designed to fit the 2015 to 2019 2.7L EcoBoost F-150s with the following Cab and Bed sizes: Regular Cab with a 8 ft. Bed, SuperCab with a 6.5 ft. Bed, SuperCab with a 8 ft. Bed, SuperCrew with a 5.5 ft. Bed, and SuperCrew with a 6.5 ft. Bed

Fitment: 2015 2016 2017 2018 2019 Details

MPN# 817725

CA Residents: WARNING: Cancer and Reproductive Harm -

What's in the Box
  • (1) Inlet Pipe
  • (1) Adapter/Extension Pipe
  • (1) Muffler
  • (1) Right Tailpipe
  • (1) Left Tailpipe - Front
  • (1) Left Tailpipe - Rear
  • (2) Side Exit Pipes
  • (2) Rear Exit Pipes
  • (2) Stainless Tip
  • Hardware Kit
Installation Info
Tech Specs
Will it fit my F-150?

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Customer Reviews (4) Write a Review

Overall Rating 4

out of 5 stars

Installation Time:Full Day

Installation Cost:0-$100

  • Loudness / Volume 4.333333 4.3
  • Exhaust Note 4 4
  • Fit & Finish 3.666667 3.7
  • Bang For Your Buck 3.333333 3.3

  • 4/5

    Installation Time: Less than 1 Hour

    July 12, 2018

    Sounds good

    Went on well, just be cognizant if you have a tow package, you may need to do some adjusting. Sound is really good, it is definitely a louder style exhaust. Overall very happy with it.


    Year: 2018 Submodel: XL Engine: 2.7L V6 Ecoboost

    Helpful (5)

  • 4/5

    September 02, 2016

    Sounds OK on a V6

    I've heard many exhaust systems on a v6 engine and this is the best sounding one. Its a nice tone, but it does get a bit raspy at higher RPMs, (4k and higher). I've had it on my truck for almost a year now and the sound has stayed consistent. I gave it a 4 out of 5 because the tips are already gathering rust from their first winter.


    Engine: 2.7L V6 Ecoboost

    Helpful (11)

  • 4/5

    Installation Time: Shop Install

    Installation Cost: 0-$100

    June 30, 2016

    Flowmaster Exhaust

    Really good product. Looks good on my F150. My only complaint is the drone at certain speeds. Can be a little loud inside the truck. Depending on your preference may be too loud...


    Helpful (8)

  • 4/5

    Installation Time: Afternoon

    May 11, 2016

    Great Product, some minor issues

    First issue is the band clamps for the 2.5 inch side of the exhaust were junk, they did not tighten down enough to secure the pipes in place. Had to do some modifications to get them to kind of work. The tail pipe tips would not stay in place, had to get some clamps from the local auto parts store to get them secure. Next is the highway drone of these around 70MPH, its pretty bad, considering reinstalling the resonator to see if that helps. The quality of the system as whole is great minus the clamps, I do love the option this kit gives you to either side exit or straight out the back. I love the sound below 70MPH so if your just driving around town the sound is awesome, any long highway trips the echoing drone can be a bit much.


    Lenoir, NC

    Helpful (7)

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