Free Shipping On Orders Over $75. Details

Talk to an F-150 Expert
1-888-706-1096
M-F 8:30A-11P, Sat-Sun 8:30A-9P
Win $5,000 For Your F-150 Enter daily!

Flowmaster American Thunder Dual Exhaust System - Side/Rear Exit (15-19 5.0L F-150)

Market Price $863.99 You Save 12% ($101.04)
Our Price

$762.95

FREE Shipping

  • Item T527020D

Will this fit your Truck?

In Stock Ships same business day.
Ship to: Ashburn - 20149
Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.
    Create a list
    Add to New List

    Saved - View your saved items

    We're sorry. We couldn't save this product at this time.

    Features, Video & 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 5.0L F-150s, Except for Regular Cabs with a 6.5 ft. Bed

    Review & Installation Video

    Review & Install Video

    What's up everybody? Justin with AmericanMuscle.com and this is my review of the Flowmaster American Thunder dual exit catback exhaust system available for five liter Ford F-150s. All right guys, let's get right into things. Now Flowmaster obviously needs no introduction, right? They're one of the largest manufacturers of aftermarket exhaust systems, been around for 50-plus years and they're made right here in the US of A. Now, the American Thunder catback is just one a few different offerings for your new F-150, and it's built around the iconic super 40 series muffler. Now this muffler is the muffler that defined that Flowmaster sound. It's the one they've been using ever since the start, and as you guys just heard, it's gonna give your rig that nice aggressive tone. Now, with that being said, it isn't the most aggressive system they offer. That title goes to the Flowmaster Outlaw series. Still, this is a solid four out of five on my one-to-five or one-to-wake-the-neighbors scale. It is aggressive. It is gonna wake the neighbors a little bit, but they're not going to call the police on you. Now one thing I really do like about this system from Flowmaster is they give you the option of either going with a side rear exit using this pipe or just straight out the back using this pipe, and that's something that a lot of other systems don't really give you the option of, and they do include both pipes here with their kit. One thing that is worth pointing out, though, with the Flowmaster American Thunder catback - this thing has been known to drone a little bit while cruising on the highway. I personally don't think it's that big of a deal. It's almost expected when you're working with that much tone, but it is worth pointing out. Here's my overview - I dunno, maybe turn up the radio a little bit. Price is going to be pretty competitive with some of the other aftermarket catbacks I've seen for the new F-150s. Not going to be the cheapest but it's certainly not gonna be the most expensive either. Therefore, it's gonna land you somewhere in the middle road in regards to overall impact to your wallet. Material-wise, here's what you're looking at guys: full 409-grade stainless steel throughout, 3 inch primary tubing coming off the cat, in to the super 40 series muffler where it kicks down to two-and-a-half inch tubing and then exits out the three-and-a-half inch brightly polished tips featuring that Flowmaster logo. Install, guys, really not that bad. A solid one out of three wrenches on our overall scale of difficulty. Now depending on your bed size or your cab size you might have to cut this system. Flowmaster does include an expansion pipe, but just to give you a for-instance here, we have a supercrew 5-and-a-half foot bed F-150, we did not have to use the expansion pipe and didn't have to cut whatsoever. Either way, really not all that bad. An extra set of hands wouldn't be a bad idea but figure about an hour or two from start to finish getting this thing bolted up. In my opinion, the Flowmaster American Thunder catback would be an awesome choice and here's why. If you can put up with a little occasional drone from time to time, you're going to have a tough sounding system made with full stainless steel and gives you the flexibility of going with a side or rear mounted tip. Be sure to check out American Thunder from Flowmaster for your ride, right here at AmericanMuscle.com.

    Power Packed Performance. AmericanMuscle’s Flowmaster American Thunder Cat-Back Exhaust delivers a sound like no other. It’s a signature roar as complex and power-driven as its architecture. To achieve it is to hear it: a mandrel bent tubing to make better use of your 5.0L F-150's exhaust system, bringing even more unsurpassed on-board control unmistakable in your Coyote-powered F-150’s amplified boom.

    Distinctively American-Made. the American Thunder Cat-Back Exhaust is a masterpiece in innovative ingenuity and painstaking engineering. It is focused on delivering peak performance its Flowmaster pedigree expects. The unparalleled Flowmaster 40-Series Delta Flow Sound is more than just upgrade, it’s an entirely new level of power.

    Best Of Breed. The proud Flowmaster seal says it all, the top pedigree in construction and materials with a robust 3.0-inch inlet and dual 2.5-inch outlet 16-gauge 409 stainless-steel tubing that can survive even the toughest challenge and environment. The Super 40 Series Delta Flow muffler bridges two 3.5-inch diameter polished stainless-steel tips. You’ve never seen such great looks or heard so much power.

    Easy Installation.It’s a worry-free/problem-free process all the way with the American Thunder Cat-Back. Featuring specially-engineered bolt-on set-up, the kit includes all the hardware to make this upgrade replacement for your stock F-150 exhaust seamless. Note, that your cab and bed size might require minor customization of the pipping but no major modifications should be expected.

    Application.This Flowmaster American Thunder Cat-Back Exhaust System is designed to fit the 2015 to 2019 5.0L F-150s with the following Cab and Bed sizes.

    Fitment: 2015 2016 2017 2018 2019 Details

    MPN# 817725

    CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

    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?

    You Might Also Like

    Customer Photos (2) Submit Your Photo

    View All 2 Photos

    More Products You Might Like

    Questions & Answers (9)

    5 Top Rated Questions

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

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

    Helpful (4)

    Do you have to stay with 40 series or could you swap out toa 70 series.

    • This exhaust system is sold with the 40 series. A 70 series muffler may be purchased separately to use instead of the 40 series.

    Helpful (1)

    1. Will this fit a 2018 with the 36gal. Extended range fuel tank? Can you retain the factory resonator by cutting down the forward pipe?

    • The Flowmaster American Thunder Dual Exhaust System can be used with the 36 gallon fuel tank option. Retaining the OEM resonator is possible but will require modifying the exhaust and thus voiding the warranty.

    Helpful (0)

    Changing my exhaust from single to dual effect my factory warranty?

    • Upgrading the exhaust should not affect the warranty of the vehicle. However, we generally recommend contacting the dealership the warranty is through to confirm what will and won't void the factory warranty.

    Helpful (0)

    Is this system available with black tips?

    • This Flowmaster American Thunder Exhaust is currently only available with the Polished Stainless Steel Tips. However, this exhaust utilizes clamp-on style tips so you could easily swap them out for a different tip in a black finish of your preference.

    Helpful (0)
    Post Your Question
    4 More Questions
    Is the included muffler STAINLESS? 1 answer
    Does this work with the integrated trailer brake controller? My 2016 has a bunch of hoses and stuff on the passenger side of the axle that I assume are part of the brake controller, that look like they would be right in the way of where the passenger side tailpipe would have to come through. 1 answer
    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 1 answer
    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. 1 answer

    People who viewed items you browsed also viewed

    Customer Reviews (23) Write a Review

    Overall Rating 4.6

    out of 5 stars

    Installation Time:Afternoon

    Installation Cost:0-$100

    • Loudness / Volume 4.545455 4.5
    • Exhaust Note 4.909091 4.9
    • Fit & Finish 4.409091 4.4
    • Bang For Your Buck 4.5 4.5



    • 5/5

      Installation Time: Afternoon

      January 14, 2019

      Great, loud, but not deafening.

      Great fit and finish. Sounds amazing on my 5.0. I previously had the Outlaw Series on my '14 F150 with a 5.0 and it was LOUD, and raspy higher in the RPM's. This exhaust is still pretty loud, but not nearly as barky and deafening and raspy as the outlaw. Perfect exhaust note in my opinion. This if for you if you want loud but not obnoxious. ( Just wish it came with black tips and not chrome. ) Fits well and no exhaust leaks.

      JohnG

      Year: 2018 Submodel: Lariat Engine: 5.0L V8

      Helpful (1)

    • 5/5

      Installation Time: Afternoon

      January 12, 2019

      Great sound!

      Very loud , but in a good way! I ended reinstalling the factory resonator before the new muffler and it actually sounds better; the drone nearly disappeared. I have it exiting behind the wheels and it looks great.

      Jason

      Year: 2018 Submodel: XLT Engine: 5.0L V8

      Helpful (2)

    • 5/5

      Installation Time: Afternoon

      December 18, 2018

      Flow master american thunder

      Solid sound pretty easy install no cutting no welding all clamp and bolt on i did it with my dad in the drive way floor jack and stands if you have a rack to use im sure it would be quicker

      StevenD

      Year: 2018 Engine: 5.0L V8

      Helpful (2)

    • 5/5

      Installation Time: Afternoon

      November 26, 2018

      Great Product

      Great product, easy install and fits well, tips look great and easy to hang even on both sides. Not the loudest exhaust by any means but has a great note especially at low RPM.

      BryanL

      Year: 2018 Submodel: XL Engine: 5.0L V8

      Helpful (1)

    • 5/5

      Installation Time: Less than 1 Hour

      July 09, 2018

      A must have for you 2015-18 F-150

      First off, I don't know why some people are trashing the clamps that accompany this kit. You have to be smarter than the clamps. Additionally, with a 3/8" impact, they snug up perfectly. From an install standpoint, I had access to a lift, so it took me about an hour. The fitment is perfect and the craftsmanship is classic Flowmaster. If you want that old school Flowmaster sound, this is the kit for you. It is a little louder then expected, but its a manly, deep sound, that is not annoying. This is the perfect exhaust system for the 5.0.

      JasonL

      Year: 2017 Submodel: XLT Engine: 5.0L V8

      Helpful (4)

    • 5/5

      Installation Time: Afternoon

      June 27, 2018

      Great exhaust!

      I was looking for almost a month trying to figure out which exhaust to buy for my 2018 Ford F-150 STX 4x4 5.0. I finally narrowed it down and I used Americantruck.coms YouTube videos to see which flowmaster exhaust I wanted. I finally decided Flowmaster American Thunder to go mid level not to loud not to boring and I think it turned out almost perfect. This exhaust is not for you if you don’t want any cabin noise it is quite loud but if you like the sound of a classic muscle car this is for you.

      AntoG

      Year: 2018 Submodel: XL Engine: 5.0L V8

      Helpful (3)

    • 5/5

      Installation Time: Afternoon

      June 17, 2018

      Flowmaster American force exhaust

      I put this exhaust on my 2015 Ford F-150 5.0L, this exhaust is well built, easy to install, love the extra tubing to convert from dual side exit to straight bumper exit, I kept the angle side exit look, this exhaust rumbles, sounds really good, there is a little bit of drone around 5000-5500 RPM, but not much, I can deal with it, makes my truck sound like a 5.0 mustang. Definitely turns heads. I highly recommend, great price and fitment.

      GusA

      Year: 2015 Submodel: Lariat Engine: 5.0L V8

      Helpful (3)

    • 5/5

      Installation Time: Afternoon

      June 06, 2018

      Awesome sound

      Sounds great, easy install. Its listed as fitting the 2018 but the hangars are NOT in the correct position and there are none for the tailpipes so they bounce alot. Best to go to a muffler shop and have them add at least two rear hangars. I am still pleased with the system. It just needs to be updated for the 2018.

      Fastregalwe2

      Year: 2013 Submodel: XLT Engine: 5.0L V8

      Helpful (4)

    • 5/5

      Installation Time: Afternoon

      May 29, 2018

      Flowmaster American Dual Thunder Exhaust

      Exhaust was well built and instructions were clear and helpful. Sounds great, not over powering, just enough rumble to make you smile.

      John

      Year: 2017 Submodel: XL Engine: 5.0L V8

      Helpful (3)

    • 5/5

      Installation Time: Afternoon

      May 24, 2018

      Good Fit

      Good kit and love the sound. Good thing with this kit is you don't have to remove your spare tire

      BryanS

      Year: 2015 Submodel: XLT Engine: 5.0L V8

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      May 19, 2018

      F150 5.0 Flowmaster

      This exhaust made my f150 5.0 sound great! Its sounds like the old fox body 5.0's i love it! The fitment is great with the optional side or rear exit. It turns heads everywhere i go.

      RickB

      Year: 2018 Submodel: XLT Engine: 5.0L V8

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      April 12, 2018

      wife loves it

      believe it or not the Wife and Mother in law said they like my old truck better 1999 f150 5.4 [sound that is] so I installed this system both are smiling now thanks American truck

      MartinS

      Year: 2018 Submodel: XLT Engine: 5.0L V8

      Helpful (5)

    • 4/5

      January 03, 2018

      exhaust

      when i finally received everything it was good as expected

      DavidW

      Year: 2016 Engine: 5.0L V8

      Helpful (7)

    • 5/5

      Installation Time: Afternoon

      December 02, 2017

      awesome sound, easy install

      This set is all you could hope for. Easy install, great sound and, looks. I like how at idle there is a nice rumble, but just get on the throttle and they wake up. At highway speeds, you can hear the exhaust in the cab, but it's not annoyingly loud, and even at those speeds they wake up when you throttle the gas.

      JohnK

      Year: 2015 Submodel: XLT Engine: 5.0L V8

      Helpful (6)

    • 3/5

      Installation Time: Afternoon

      October 03, 2017

      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: XLT Engine: 5.0L V8 Marysville, OH

      Helpful (5)

    • 5/5

      Installation Time: Afternoon

      September 21, 2017

      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 Engine: 5.0L V8

      Helpful (6)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: 0-$100

      September 02, 2017

      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: XLT Engine: 5.0L V8

      Helpful (9)

    • 5/5

      Installation Time: Afternoon

      July 19, 2017

      2015

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

      Dennis

      Year: 2015 Engine: 5.0L V8

      Helpful (5)

    • 3/5

      Installation Time: Afternoon

      April 30, 2017

      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: XLT Engine: 5.0L V8 Newport News, VA

      Helpful (21)

    • 1/5

      Installation Time: Afternoon

      November 05, 2016

      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

      Engine: 5.0L V8

      Helpful (8)

    Related F-150 Categories