Win $5,000 For Your F-150! Enter Now!
Talk to an F-150 Expert
1-888-332-7930
Mon - Sun, 8:30 AM EST - 11:00 PM EST

Free Shipping On Orders Over $49. Details

Flowmaster American Thunder Cat-Back Exhaust - Split Side/Rear Exit (15-18 3.5L EcoBoost, Excluding Raptor)

Market Price $850.99 You Save 13% ($111.02)
Starting At

$739.97

FREE Shipping
  • Item T527020B
  • MPN# 817725

Will this fit your F-150?

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 2015-2018 3.5L EcoBoost F-150s, Excluding Raptors
  • Not Compatible on Regular Cabs with a 6.5 ft. Bed
Signature Flowmaster Sound. Give your turbocharged 3.5L EcoBoost F-150 that unmistakable Flowmaster sound with the American Thunder Cat-Back Exhaust System from AmericanMuscle. The Flowmaster American Thunder Cat-Back Exhaust with its mandrel bent tubing will greatly improve your truck's exhaust flow for an increase in power. The included Super 40 Series Delta Flow Muffler will improve your exhaust's sound for a deep aggressive exhaust note.

Quality Construction. Proudly Made in the USA, this Flowmaster American Thunder Cat-Back Exhaust is constructed from durable 3.0 in. inlet and dual 2.5 in. outlet 16 gauge 409 stainless steel tubing for it's strength and corrosion resistant properties. This Cat-Back Exhaust features a Super 40 Series Delta Flow American Thunder muffler, that connects to a pair of 3.5 in. diameter polished stainless steel tips for great looks and sound. As an added bonus, the tips are embossed with the "Flowmaster" logo for true custom styling.

Bolt-On Installation. Flowmaster engineered this kit to be a direct upgrade replacement for your F-150 stock exhaust. All of the necessary hardware is included and installs easily with basic hand tools, with no extra modifications to your F-150. Depending on your cab and bed size, some minor cutting to the piping may be required.

Lifetime Warranty. Flowmaster is confident in the quality of their exhaust system by backing it with a Lifetime Limited Warranty. Some exclusions do apply, please see manufacturer's warranty for full details.

Application. This Flowmaster American Thunder Cat-Back Exhaust System is designed to fit the 2015 to 2018 3.5L EcoBoost F-150s, excluding Raptors, 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
  • SuperCrew with a 6.5 ft. Bed

Fitment: 2015 2016 2017 Details

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
Will it fit my F-150?

Most Helpful Reviews

5/5
The 5.0 is alive in the F-150

The kit: The kit was package well and all the parts were labeled for easy identification. The only negative would be the lack of instructions. (Missing) This was easy to correct on Flowmaster site. The ...

Read More
Helpful (3)

3/5
Not what I thought it was going to be :/

Install wasn't bad except for the horrible clamps. I don't have an impact wrench so I couldn't get them 100 tight so I ended up going to a exhaust shop and having them hit all the clamps with an impact ...

Read More
Helpful (3)

Overall Rating 4.1 out of 5 stars
Read All 12 Reviews

Customer Photos

You Might Also Like

4 Questions / 3 Answers

Ask a Question

Can you leave the spare tire in original location after exhaust is installed?

Rogy

  • The Flowmaster American Thunder Cat-Back Exhaust will allow the spare tire to remain in its stock location, and remain accessible.

    Rob D

Helpful (1)

I'm looking for a cat-back duel tail pipe system (this system) with a Flowmaster 50 series Delta flow muffler. I feel like I have searched everywhere but I can't seem to find what I'm looking for, or it may not be available for my truck, I'm not sure which. I was wondering if you could point me in the right direction. The 40 series is just a little too aggressive for what I wanted, but if the 50 series is not available for this set up I might have to go with the 40. any help would be greatly appreciated. Thank you

ChrisG

  • Unfortunately, we do not carry a Flowmaster catback exhaust that uses the Flowmaster 50 Series muffler. Your best bet would be to contact Flowmaster, or replace the mufflers in a Dual Tail Pipe System with the Flowmaster 50 Series muffler.

    VincentV

Helpful (0)

Those pipes bounce around quite a bit in the video and makes the workmanship look a bit shoddy (not yours, Flowmaster's). Other manufactures seem to secure the pipes to the frame right before the rear bumper and do not bounce around. Do you know if there are hangers or something from Flowmaster that would mitigate that?

Zack

This may be a side note but what lift is on the maroon truck. I ordered this muffler and would like my truck to look like this.

V8powerhorse

  • Hi, The lift kit on our maroon F-150 is a Rough Country 6 in. Suspension Lift Kit Item# T527476. Here is the link http://www.americanmuscle.com/rough-country-6in-suspension-lift-kit-2015-4wd.html

    Chris J

Helpful (0)

More Products You Might Like

Customer Reviews (12) Write a Review

Overall Rating 4.1

out of 5 stars

Installation Time:Full Day

Installation Cost:0-$100

  • Loudness / Volume 4.7 4.7
  • Exhaust Note 4.9 4.9
  • Fit & Finish 3.7 3.7
  • Bang For Your Buck 3.9 3.9



  • 3/5

    Installation Time: Afternoon

    April 30, 2017

    Review from Flowmaster American Thunder Cat-Back Exhaust - Dual Side/Rear Exit (15-18 5.0L)

    Not what I thought it was going to be :/

    Install wasn't bad except for the horrible clamps. I don't have an impact wrench so I couldn't get them 100 tight so I ended up going to a exhaust shop and having them hit all the clamps with an impact wrench. I've had the exhaust on for 6 months now and sadly it has started to rust (see pics). For close to $800 I would have expected better quality tubing. I shouldn't have to paint it, but I will. I love the sound, but nothing much else about the whole experience.

    tspike

    Year: 2016 Submodel: 5.0L V8 XLT

    Helpful (3)

  • 5/5

    Installation Time: Afternoon

    October 16, 2015

    Review from Flowmaster American Thunder Cat-Back Exhaust - Dual Side/Rear Exit (15-18 5.0L)

    The 5.0 is alive in the F-150

    The kit: The kit was package well and all the parts were labeled for easy identification. The only negative would be the lack of instructions. (Missing) This was easy to correct on Flowmaster site. The instruction could be downloaded. They also have video to watch if you want to view Install: The removal and install is relatively simple. I completed the project on my garage floor with a jack and stands. The only difficulty that I had was lifting the truck at a comfortable/safe work height to remove the factory exhaust. The instruction suggests “cutting” the factory mufflers off which would be easier but also ruins the factory exhaust. It takes some muscle and patients but I did remove it with out cutting it. The installation went smooth. Number 1 Trick/tip. Just “snug each bolt as you install each part of the kit and use a couple bungee cords to help support the kit in place as you install each section. Once you have everything “snugged” in place check to make sure the muffler is level. Once the muffler is level tighten all the bolts starting from the front and working towards the back of the kit. The tips will require some measurements and several adjustments to get each side exactly the same. Performance/sound: The best part! Nothing beats the rumble of the 5.0. The exhaust has a sweet rumble at idle and really becomes powerful when you floor it. The exhaust is not too loud. At highway cruising speed it has a nice tone that does not overpower the cabin. I did not notice an increase in mile per gallon or that dramatic gain in HP.(feels a little quicker in response but I don’t drive my truck that aggressively) My truck sounds great and the dual exhaust out the side looks great. Highly recommend this kit!

    E2014GTCS

    Year: 2015 Submodel: Lariat Lincoln University, PA

    Helpful (3)

  • 5/5

    Installation Time: Afternoon

    October 31, 2016

    Review from Flowmaster American Thunder Cat-Back Exhaust - Dual Side/Rear Exit (15-18 5.0L)

    Just what the driver ordered!

    Added so much life to my 5.0! Ford should offer this exhaust at the dealerships.

    PYRO

    Year: 2015 Submodel: 5.0L V8 XL

    Helpful (1)

  • 4/5

    September 02, 2016

    Review from Flowmaster American Thunder Cat-Back Exhaust - Split Side/Rear Exit (15-18 2.7L EcoBoost)

    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.

    hyawatha15

    Year: 2015 Submodel: 2.7L V6 EcoBoost XL

    Helpful (1)

  • 5/5

    August 02, 2016

    Review from Flowmaster American Thunder Cat-Back Exhaust - Dual Side/Rear Exit (15-18 5.0L)

    Awesome

    The flowmaster exhaust system was easy to install. Even better with a lift to get under the truck. The sound is amazing. I feel sorry for my neighbors starting in the morning for work

    Fitz

    Year: 2016 Submodel: 5.0L V8 FX4

    Helpful (1)

  • 4/5

    Installation Time: Shop Install

    Installation Cost: 0-$100

    June 30, 2016

    Review from Flowmaster American Thunder Cat-Back Exhaust - Split Side/Rear Exit (15-18 2.7L EcoBoost)

    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...

    Aubreyfsu76

    Year: 2015 Submodel: XLT

    Helpful (1)

  • 4/5

    Installation Time: Afternoon

    May 11, 2016

    Review from Flowmaster American Thunder Cat-Back Exhaust - Split Side/Rear Exit (15-18 2.7L EcoBoost)

    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.

    Omeanix

    Year: 2016 Submodel: XLT

    Helpful (1)

  • 3/5

    Installation Time: Afternoon

    October 03, 2017

    Review from Flowmaster American Thunder Cat-Back Exhaust - Dual Side/Rear Exit (15-18 5.0L)

    OK.. but not as I expected..

    First I will have to agree with several other comments I saw about the band clamps -- I found it IMPOSSIBLE to get them tight enough to actually hold the pipes in place.. TWICE within a month I had to get under the truck - re adjust and fully seat all of the pipes again and re - tighten. Finally gave up and had them welded as again after a week started noticing the left tail pipe sagging down lower than the right... Also started noticing corrosion on the pipes almost instantly.. These do sound great, a touch louder than I wanted, yet not loud enough I cant stand them going down the highway.

    13Boss0033

    Year: 2016 Submodel: 5.0L V8 XLT

    Helpful (0)

  • 5/5

    Installation Time: Afternoon

    September 21, 2017

    Review from Flowmaster American Thunder Cat-Back Exhaust - Dual Side/Rear Exit (15-18 5.0L)

    Music to my ears

    Great sound with my truck. Need two people to install if you don;t have access to a lift and have to jack up. Easy to follow instructions. Well worth the money. Only had one problem. Had to buy U clamps instead of using the ones in the kit. Could not get them tight enough.

    JosephB

    Year: 2015

    Helpful (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: 0-$100

    September 02, 2017

    Review from Flowmaster American Thunder Cat-Back Exhaust - Dual Side/Rear Exit (15-18 5.0L)

    I remember the '70s!

    I'm getting a little lazy to install the exhaust myself, but, I had the new system installed for $100. I haven't had this much fun in a long time. My truck only has 200 miles on it and it sounds like a truck should sound. This exhaust adds personality to the truck that was missing.

    MartinH

    Year: 2017 Submodel: 5.0L V8 XLT

    Helpful (0)

  • 5/5

    Installation Time: Afternoon

    July 19, 2017

    Review from Flowmaster American Thunder Cat-Back Exhaust - Dual Side/Rear Exit (15-18 5.0L)

    2015

    Couldn't be more happy with this kit. Sounds great, turns heads, easy install, great value.

    Dennis

    Year: 2015

    Helpful (0)

  • 1/5

    Installation Time: Afternoon

    November 05, 2016

    Review from Flowmaster American Thunder Cat-Back Exhaust - Dual Side/Rear Exit (15-18 5.0L)

    Worst clamps I've ever come across!!!!

    Sounds great lots of drone but that's the way it goes! But every clamp does not hold like it should!!! I used a impact gun and they are all all coming lose! I'm going to weld it solid! This has zero to do with A/M everyone at American muscle is great!!! I have zero complaints with them! But Flowmaster dropped the ball with the fit and finish!

    Grabberblue

    Year: 2016 Submodel: 5.0L V8 XLT

    Helpful (0)

Related F-150 Categories