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Flowtech 91673-1

Shorty Headers 2004-2008 Ford F-150 5.4L 50-State Legal

Flowtech 91673-1


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Estimated ship date 09/25/17 if Ordered Today
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Flowtech 91673-1 Shorty Headers 2004-2008 Ford F-150 5.4L 50-State Legal $416.95
Short Headers
  • 2004-2008 Ford F-150
  • 5.4L
  • 1-5/8" Primary Tube
  • Mild Steel
  • Ceramic Metallic Coated Finish
  • C.A.R.B. EO D-115-19

  • Flowtech 91673-1 Details


  • Ceramic Coated
  • Flowtech Headers are the perfect combination of quality and value. This header fits the popular 2004-2008 Ford F-150 V8-5.4L 2WD/4WD. This header features 1-5/8" primary tubes and a 2-1/2" collector for increased exhaust flow for increasing performance, improving throttle response and providing a broad torque curve. This header accommodates all emission control devices and comes with premium aluminum header gaskets and hardware. This header is coated with Satin Silver Metallic Ceramic Coating. 50 state legal - CARB EO D-115-19


    • 50 state legal
    • Heavy duty 16-gauge tubing for increased strength and durability
    • 1-5/8” primary tube diameter for increased exhaust flow increasing performance and improving throttle response
    • OE style 2-1/2” ball and socket collector connects to factory exhaust head pipe
    • TIG-welded, machined 3/8” header flange for a leak-free seal and maximum strength
    • Mandrel-bent tubing provide consistent tubing diameter for smooth flow and increased exhaust velocity
    • Accommodates all factory OE components
    • Available in a high heat resistant black paint or a satin silver metallic ceramic thermal barrier coating
    • Premium aluminum header gaskets included
    • Headers are a must if you are using a cold air intake, cat-back exhaust system or tuner
    • The installation of this header requires the motor to be lifted off of the mounts to fit the passenger side header. If you don’t have this capability, we recommend professional installation. Please read the installation instructions completely prior to installation.


    Tube Diameter
    Collector Tube Size (in.)
    Tube Direction
    Down Swept
    Port Shape
    Same As Port/Can Be Matched
    Engine Make/Size
    Ford 5.4L
    Ceramic Coated Mild Steel
    Header Style
    Silver Metallic Ceramic
    Manufacturer's Part Number:

    FlowTech's Shorty Truck Headers are the perfect starting point to customize your 2WD or or 4WD vehicle! Simply remove the restrictive factory exhaust manifolds and bolt these headers in their place. They will bolt directly to your factory or OE-style exhaust, giving you more power and better fuel economy. Mandrel-bent 16-gauge steel tubes along with extra thick 3/8" exhaust flanges provide a reliable header with a leak-free seal! These headers connect to all factory emissions equipment and include necessary hardware and gaskets.

  • 3/8" exhaust flanges
  • Mandrel-bent 16-gauge tubing (.049" thick)
  • Direct replacement for OE exhaust manifolds
  • Complete with premium gaskets and hardware
  • Accommodates all factory emissions-control devices

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