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Flowmaster American Thunder Stainless Steel Dual Exhaust System - Side/Rear Exit (09-10 5.4L F-150, Excluding Raptor)

Market Price $814.99 You Save 12% ($95.04)
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  • Item T527175C

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    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
    Make Your Truck Roar. Roar down the road with the sounds of raw power thanks to this Flowmaster American Thunder stainless steel cat-back exhaust. It's optimized to put out a rumbling aggressive noise every time that you drive, and you'll be thrilled to show off your new kit the next time that you go for a drive. Your truck will sound larger and more powerful because this exhaust kit uses wide 3" piping and tips, and features a specially designed muffler for the best acoustics.

    Serious Torque. You won't believe how much faster your truck feels after you install this Flowmaster American Thunder stainless steel cat-back exhaust system. The kit goes on easily, but it literally transforms the way that exhaust exits out of your vehicle. Instead of taking the cramped and high pressure path to the outside world, the new system creates a smooth flowing and constant path through mandrel-bent tubes that won't kink or minimize air flow. The result is that your engine can run more effectively than ever before, and you'll see horsepower and torque improvements as soon as this kit is put into position.

    409 Stainless. All the pipes, the muffler and the tip of this exhaust system are made from thick and reliable 409 stainless steel. The overall kit is designed to withstand corrosion, heavy use and tough situations that would make a standard exhaust fail over time. That's why this system is made to work for years without issues, and why you can count on it to keep running long after you would have replaced a standard exhaust pipe.

    Simple Installation Steps. Follow along with the basic installation steps and you can go from having a basic exhaust system to getting this one installed on your truck. Just remove the old parts and use the OEM hangers to lock in your new ones. You will have all the hardware that you need to do the job and it won't take much time at all to go from start to finish. Around two hours is all you need to get your new exhaust system installed and ready to go. Some cutting may be required to get the pipes to fit properly depending on the bed style your truck has.

    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

    MPN# 817522

    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
    • Hardware Kit
    Installation Info
    Tech Specs
    Will it fit my F-150?

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          Customer Reviews (1) Write a Review

          Overall Rating 2

          out of 5 stars

          • 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.


            Engine: 5.4L V8

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