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Flowmaster American Thunder Dual Exhaust System - Side/Rear Exit (15-19 3.5L EcoBoost F-150, Excluding Raptor & 2019 F-150 Limited)

Market Price $863.99 You Save 12% ($101.04)
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  • Item T527020B

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Ship to: Ashburn - 20149
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    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 3.5L EcoBoost F-150s, Excluding Raptors
    • Not Compatible on Regular Cabs with a 6.5 ft. Bed

    Review & Installation Video

    Review & Install Video

    Thunderous Flowmaster Roar. Feel the Flowmaster’s signature sound as it revs up to Number One! AmericanMuscle’s American Thunder Cat-Back Exhaust powers up your truck’s exhaust flow with its mandrel bent tubing. Its Delta Flow Muffler gives it an incontestable presence with its fierce exhaust note sending shivers with every rumble.

    Peak Performance Designed. The Flowmaster American Thunder Cat-Back Exhaust’s 3.5-inch polished stainless-steel tips are hard-wearing and long-lasting. The Delta Flow American Thunder muffler has good looks and the guts to match, thundering louder than its competition. The embossed “Flowmaster” logo certifies it the powerhouse system you can count on.

    Proudly American-Made. The Flowmaster American Thunder Cat-Back Exhaust’s outshines with its unbeatable 16-guage 409 stainless-steel Delta Flow muffler sound and tough 3-inch inlets and dual 2.5-in outlet Mandrel-bent tube pushes your turbo-charged 3.5L EcoBoost F-150 power beyond the max.

    Effortless Bolt-On Installation. The Flowmaster American Thunder Cat-Back Exhaust is a direct upgrade replacement for the stock F-150 system. It is compatible with 2015-2019 3.5L EcoBoost F-150 (excluding Raptors). All hardware necessary is included in this generous kit. Only basic hand tools are required for easy installation. No extra modifications will be needed to your F-150 except in some cab and bed sizes. Some minor cutting to pipping might apply in the latter cases.

    Application.This Flowmaster American Thunder Cat-Back Exhaust System is designed to fit the 2015 to 2019 3.5L EcoBoost F-150s, excluding Raptors, with the following Cab and Bed sizes.

    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 (2) Write a Review

    Overall Rating 4.5

    out of 5 stars

    Installation Time:Afternoon

    • Loudness / Volume 4.5 4.5
    • Exhaust Note 4 4
    • Fit & Finish 4.5 4.5
    • Bang For Your Buck 4 4

    • 4/5

      Installation Time: Less than 1 Hour

      January 26, 2019

      Great sound!

      This is definitely a loud and proud system. Absolutely love the deep growling tone. Both tips broke during tightening (wouldn't tighten enough to not fall off). After making my own clamps for the tips, all was good...the sound made up for bad welds. I do recommend this system but definitely invest in GOOD clamps.


      Year: 2018 Engine: 5.0L V8

      Helpful (1)

    • 5/5

      Installation Time: Afternoon

      July 01, 2018


      This is a really nice exhaust kit. It was very easy to install and looks sweet. The sound is cool but don’t expect V8 sound. Definitely sounds like a V6 with dual exhaust.


      Year: 2015 Submodel: XLT Engine: 3.5L V6 Ecoboost

      Helpful (5)

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