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Flowmaster American Thunder Aluminized Steel Cat-Back Exhaust - Split Side/Rear Exit (04-08 5.4L)

Market Price $652.99 You Save 13% ($86.02)
Starting At

$566.97 (each)

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  • Item T18300B
  • MPN# 17417

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Features & Details

  • Moderate Flowmaster Super 40 Series Sound
  • Durable Aluminized Steel Construction
  • 3 in. Inlet, Dual 2.5 in. Outlet Mandrel-Bent Tubing
  • 3 in. Polished Stainless Steel Tips
  • Bolt-On Installation; Some Trimming May Be Required
  • Choice of Side or Rear Exit
  • Made in the USA
  • Fits 2004-2008 5.4L F-150s
Give your Truck a Sinister Exhaust Tone. Celebrate the strength and power of your pickup with a powerful new sound with this Flowmaster American Thunder dual rear cat-back system. It's optimized for dual rear or side output and made to sound really tough. Your truck will take on a more aggressive tone that you can show off wherever you drive to. When you add this kit to your pickup you'll move from a neutral sound to something much more sinister, which is what most truck owners enjoy. Modify your pickup with this dual pipe setup and enjoy the improved audio.

Infuse Your Truck with Power. You won't transform your truck into a drag racer with this Flowmaster American Thunder dual rear cat-back system, but you will make it more powerful. Your engine is a delicate machine that operates better in certain conditions. The improved exhaust design of this kit with large pipes and a smooth flow of fumes will improve the efficiency of your engine. That boosts your power nicely.

Tough and Long Lasting. The Flowmaster American Thunder dual rear cat-back system is long-lasting because it is composed of stainless steel. There are few exhaust systems out there that use more powerful material components than this one. You can count on your exhaust kit to last over time thanks to these tough materials. The pipes and muffler are made from 16 gauge steel that won't break and will hold up to most driving pressures just fine.

Install Simply. This system installs quickly and easily. Professionsl can put it on in just a few hours. Even an amateur shouldn't have too much trouble installing the hangers and using the included hardware to hook up the pipes. When you do this you get a good solid perfoming exhaust that goes on quickly and easily.

Application. Fits 2004 to 2008 Ford F-150 and Lincoln Mark LT trucks with a 4.6L or 5.4L engine and all wheelbases, fits 2 and 4 wheel drive.

Fitment: 2004 2005 2006 2007 2008 Details

What's in the Box
  • (1) Inlet Pipe
  • (1) Extension Pipe
  • (1) Muffler
  • (1) Right Tailpipe
  • (1) Left Tailpipe - Front
  • (1) Left Tailpipe - Rear
  • (2) Side Exit Pipes
  • (2) Rear Exit Pipes
  • (1) Frame Hanger - Rear
  • (1) Rubber Hanger
  • (6) 2-1/2" Clamps
  • (1) 5/16" x 1-1/4" Bolt
  • (2) 5/16" Flat Washers
  • (1) 5/16" Lock Washer
  • (1) 5/16" Nut
  • (2) 7/16" Hanger Keepers
  • (2) 3" Clamps
  • (1) Clamp Hanger
Installation Info
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Customer Reviews (1) Write a Review

Overall Rating 5.0

out of 5 stars

Installation Time:Afternoon

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



  • 5/5

    Installation Time: Afternoon

    February 01, 2017

    Nice sound

    Sounds great gives that deep sound I was looking for! Very great quality and didn't take long to install

    Mustanggirl

    Year: 2007 Submodel: 5.4L V8 FX2

    Helpful (1)

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