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Flowmaster American Thunder Stainless Steel Cat-Back Exhaust - Split Side/Rear Exit (09-10 5.4L, Excluding Raptor)

Market Price $799.99 You Save 13% ($105.02)
Starting At

$694.97

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  • Item T527175C
  • MPN# 817522

Will this fit your F-150?

Features & Details

  • Aggressive Flowmaster 40-Series Delta Flow Sound
  • Durable 409 Stainless Steel Construction
  • 3" Inlet, 2.5" Outlet Mandrel-Bent Tubing
  • 3" Polished Stainless Steel Tips
  • Easy Installation; Some Trimming May Be Required
  • Choice of Rear or Side Exit
  • Fits All 2009-2010 5.4L F-150s, Excluding Raptors
The Sound of Power. Give your 5.4L F-150 a louder, more exciting tone than factory by upgrading to the Flowmaster American Thunder Stainless Steel Cat-Back Exhaust. This Cat-Back Exhaust system has been dyno-tuned to provide your V8 truck with an increase in exhaust flow that will amp up your throttle response, performance fuel economy.

Quality Construction. Proudly made in the USA, Flowmaster constructs this American Thunder Cat-Back Exhaust from durable 3 inch inlet/dual 2.5 inch outlet 16 gauge 409 stainless steel tubing for it's corrosion resistant properties. The Cat-Back System features a Super 40 Series Muffler and a pair 3 inch diameter polished stainless steel tips for great muscle car 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 trimming 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. The Flowmaster American Thunder Stainless Steel Cat-Back System is designed to fit all 2009 to 2010 F-150s powered by the 5.4L engine. It is not compatible with the 5.4L SVT Raptor.

Fitment: 2009 2010 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
  • Hardware Kit
Installation Info
Will it fit my F-150?

Most Helpful Reviews

5/5
Sounds amazing

I paired it with a kandn series 77 cold air intake and it sounds incredible. Installation was fairly easy. Really made my 5.0 stand out. I don't have very much droning. Great system. Highly recommend ...

Read More
Helpful (1)

5/5
Love it

The Flowmaster American thunder cat-back exhaust sounds great. Great rumble through the first five gears then levels out in sixth then you'll get a slight droning but nothing worth down grading this exhaust ...

Read More
Helpful (1)

Overall Rating 4.5 out of 5 stars
Read All 8 Reviews

Customer Photos

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1 Questions / 1 Answers

Ask a Question

Can the Flowmaster black ceramic stainless exhaust tip (Item #: T528207-A) be used in place of the provided tips for this exhaust, or are buyers restricted to the provided tips only?

AdamK

  • Unfortunately we do not have an option to get the black ceramic tips with this Flowmaster system, however you can purchase and install the black ceramic tips (T528207-A) seperately, they will fit on the American Thunder catback system.

    AMDell

Helpful (1)

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Customer Reviews (8) Write a Review

Overall Rating 4.5

out of 5 stars

Installation Time:Weekend

Installation Cost:$100-$250

  • Loudness / Volume 4.8 4.8
  • Exhaust Note 4.8 4.8
  • Fit & Finish 4.8 4.8
  • Bang For Your Buck 5 5



  • 5/5

    Installation Time: Afternoon

    January 04, 2017

    Review from Flowmaster American Thunder Stainless Steel Cat-Back Exhaust - Split Side/Rear Exit (11-14 5.0L)

    Sounds amazing

    I paired it with a kandn series 77 cold air intake and it sounds incredible. Installation was fairly easy. Really made my 5.0 stand out. I don't have very much droning. Great system. Highly recommend the pair

    Wes

    Year: 2013 Submodel: 5.0L V8 XLT

    Helpful (1)

  • 5/5

    August 31, 2016

    Review from Flowmaster American Thunder Stainless Steel Cat-Back Exhaust - Split Side/Rear Exit (11-14 5.0L)

    Love it

    The Flowmaster American thunder cat-back exhaust sounds great. Great rumble through the first five gears then levels out in sixth then you'll get a slight droning but nothing worth down grading this exhaust system. Loud enough to make you smile and grab attention but not so loud the police will pull you over. Great way to bring out the true sound of the V8.

    Thedude

    Year: 2013 Submodel: 5.0L V8 FX4

    Helpful (1)

  • 4/5

    July 06, 2016

    Review from Flowmaster American Thunder Stainless Steel Cat-Back Exhaust - Split Side/Rear Exit (11-14 5.0L)

    Let the Flowmaster ROAR!

    I am writing this review after having the exhaust system installed on my 2013 STX 5.0L F-150 for just one week. First of all, the sound when on throttle is amazing. It is just the right amount of growl to satisfy a motor head yet not too loud to draw the attention of law enforcement. It truly brings out that "V-8 sound" that makes the engine feel classic. The only times the exhaust sounds less than perfect is when cruising at highway speeds of roughly 55-60 mph when the truck is in 6th gear at between 1600-1900 rpm. There's just not enough "stress" going on with the engine to push the musical notes through the exhaust effectively so the sound really fades and can drone a little. Bump the speed up to 62 mph and up and this disappears. The exhaust makes fantastic sound when pulling a trailer or when at interstate highway speeds of 65 mph plus. Fit and finish of the exhaust is excellent and required no modifications or cutting on my 2013 STX.

    Aron

    Year: 2013 Submodel: 5.0L V8 STX

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    October 16, 2015

    Review from Flowmaster American Thunder Stainless Steel Cat-Back Exhaust - Split Side/Rear Exit (11-14 5.0L)

    american thunder catback

    Very impressed with this product.The fit and finish are very good. My truck sounds great all through the power band. I recently installed a borla ford raceing system on a 2013 f-150 I had fitment issues and never did get the pipes straight at the outlet,that system was nearly two times as much money,so I'm even more impressed with the flowmaster system.

    svtman

    Year: 2014 Submodel: STX Bowman N.D

    Helpful (1)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    March 22, 2017

    Review from Flowmaster American Thunder Stainless Steel Cat-Back Exhaust - Split Side/Rear Exit (11-14 5.0L)

    Great sound

    Great product sounds great and is worth getting cost $150 to install from shop

    RichardS

    Year: 2013 Submodel: 5.0L V8 XLT

    Helpful (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: 0-$100

    March 04, 2017

    Review from Flowmaster American Thunder Stainless Steel Cat-Back Exhaust - Split Side/Rear Exit (11-14 5.0L)

    Awesome sound

    I've gotten alot of compliments about how my truck sounds. Like the other reviews sounds loud enough to turn heads when you want to but quiet when you need it to be. Drones a little at 1800 rpms.

    JackH

    Year: 2014 Submodel: 5.0L V8 STX

    Helpful (0)

  • 2/5

    August 14, 2016

    Not Impressed

    I'm not impressed by this exhaust. First of all, it arrived with the box all torn up and the papers inside shredded. It looked like it had been opened before I received it. The exhaust did not fit together well for starters. Both the outlet pipes from the muffler did not fit into the muffler, after an hour of messing around with them I was only able to get the pipes halfway in. The exhaust clamps that came with the kit did not clamp down tight enough to hold the pipes in place, I ended up breaking two of the clamps trying to get them tight enough and ended up going to oreilly's and buying a different style clamp that worked much better. The exhaust is much louder than I was expecting and has a drone at 1500-2000 rpm, which is where the truck sits at most driving speeds. It sounds mean when you rev the engine and get down on the throttle, but at cruising speed it gets annoying pretty quickly. Overall I'm not impressed with this product, I would've expected more for $675.

    2010

    Year: 2010 Submodel: 5.4L V8 Lariat

    Helpful (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    September 28, 2015

    Review from Flowmaster American Thunder Stainless Steel Cat-Back Exhaust - Split Side/Rear Exit (11-14 5.0L)

    2013 F150 Flowmaster

    I had this system installed on my wife's 2013 F-150 and it sounds awesome. The only system that may be louder would be the Outlaw cat back, but the American Thunder cat back is a perfect fit ! It sounds mean man............lemme tell ya. makes me want to get on it every time I am in the truck. I have not had any issues with this system in the 3 years I have had this on the truck. This is a high quality kit that will last you.

    Ross12

    Year: 2013 Submodel: XLT Fort Dix, NJ

    Helpful (0)

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