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  1. Flowmaster 04-08 5.4L F-150 American Thunder Dual Exit CatBack
    $745.95

    Flowmaster 04-07 5.4L F-150 American Thunder Dual Exit CatBack

    • Flowmaster American Thunder Dual Exit Cat-Back Exhaust System (Optional Dual Rear or Side Exit, Behind Rear Axle)
    • Dual 2.50-inch, mandrel bent aluminized tail-pipes
    • Two 3-inch, angle cut stainless steel tips
    • Works With All 2 and 4 Wheel Drive Trucks
    • Super 40 Series Mufflers



    The D.O.R. systems are designed for the person who wants that custom look of a dual exhaust on a late model vehicle that came with a factory single exhaust. These systems feature mandrel bent 16 gauge aluminized steel tubing, either weld-on or flanged inlet pipe/pipes, specially tuned muffler, clamps, hangers and stainless steel exhaust tips for that aggressive look and sound of a dual exhaust system.

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  2. Flowmaster 04-08 5.4L F-150 Force II Dual Exit Cat-Back Exhaust
    $725.95

    Flowmaster 04-07 5.4L F-150 2.5" Force II Dual Exit Cat-Back Exhaust System

  3. Optional Dual Rear or Side Exit, Behind Rear Axle
  4. Dual 2.50-inch, mandrel bent aluminized tail-pipes
  5. Two 3-inch, angle cut stainless steel tips
  6. Works With All 2 and 4 Wheel Drive Trucks
  7. Learn More
  • Flowmaster 04-08 5.4L F-150 Force II 3" Single Exit CatBack
    $529.95

    Flowmaster 04-07 5.4L F-150 Force II 3" Single Exit Cat-Back Exhaust System

  • Single Side Swept Exit CAT-Back
  • 3-inch Single Exhaust, 3-inch Stainless Tip


  • The S.O.S. system is for the person who wants a subdued, but custom look, with all the benefits of a Flowmaster exhaust system. These systems feature mandrel bent 16 gauge aluminized steel tubing, either weld-on or flanged inlet pipe/pipes, specially tuned muffler, clamps, hangers and stainless steel exhaust tip exiting in the factory location out the side behind the rear tire of the vehicle.Learn More

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