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Flowtech 1-5/8-Inch Shorty Headers; Black Painted (04-08 5.4L F-150)

Item T556104
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Market Price $501.99 You Save 15% ($73.04)
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$428.95 (kit)

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      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • Increase Horsepower and Torque
      • Improve Exhaust Sound
      • Short Tube Header Design
      • Retains OE Catalytic Converters and Mid-Pipe
      • Feature 1.62-Inch Primary Tubes with 2.50-Inch Collector
      • Free-Flowing Mandrel-Bent Tubing
      • Durable Cold-Rolled Mild Steel Construction
      • Coated with a Temporary Black Paint
      • Street-Legal Design
      • CARB Certification E.O. Number D-115-19
      • Require Calibration for Operation
      • Fits All 2004-2008 5.4L Ford F-150 Models


      Increased Horsepower and Torque.Improve the overall performance of your Ford F-150 with these Flowtech 1-5/8-Inch Shorty Headers; Black Painted. They feature a free-flow design that promotes improved exhaust flow, increasing power and torque. With the increase in power that these headers provide, you can push your truck harder in aggressive driving conditions with ease.

      Superb Exhaust Tone.These Flowtech Shorty Headers feature a 1.62-inch diameter primary tube that is designed to enhance the efficiency of your vehicle's exhaust flow. This allows for the exhaust to exit more smoothly and faster, producing an aggressive exhaust tone each time you step on your accelerator.

      Reuses Factory Catalytic Converters. These Shorty Headers are compatible with your F-150's factory exhaust components, including your OEM mid-pipe and catalytic converters. By reusing the stock cats, your vehicle remains street-legal.

      Heavy-Duty Quality. The durable construction of these headers ensures reliable performance that lasts years. They are made of high-quality, cold-rolled mild steel for remarkable strength. They are also mandrel-bent to ensure smoothness and consistent tubing diameter. Additionally, these headers feature TIG-welded and machined flanges to guarantee leak-free performance.

      Rugged Black Coating. These Headers feature a temporary, non-high temperature black coating. Please note that this coating is designed to burn off during use. AmericanTrucks recommends overlaying high-temperature paint or other coatings on these headers.

      Tuning Required. The use of these Shorty Headers will require a hand-held tuner to reprogram your truck’s (ECU) for operation. By reprogramming your F-150's ECU, you will be able to enjoy the full range of power that these headers are designed to provide.

      CARB-Certified. For your peace of mind, these Shorty Headers are 50-state smog legal under CARB E.O. number D-115-19. This means they may be used on pollution-controlled vehicles.

      Application.These Flowtech 1-5/8-Inch Shorty Headers; Black Painted are specifically designed for use on all 2004-2008 5.4L Ford F-150 models.



      Flowtech 91673FLT

      CA Residents: WARNING: Cancer and Reproductive Harm -

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (2) Shorty Headers
      • (2) Sets of Aluminum Gaskets
      • Installation Hardware

      Customer Reviews (3)

        Brand Image

        Reviews of Flowtech Exhaust products have an average rating of 5.0 out of 5

          Questions & Answers

          10 More Questions

          Will It Fit My F-150

          • 5.4L V8 - 04, 05, 06, 07, 08