Fuel Feed Line SS Braided Hose Kit - 7.3L 99-03

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Riffraff Diesel Fuel Feed Line SS Braided Hose Kit - 7.3L 99-03

Our new feed line kit utilizes Eaton Aeroquip® 304 Stainless Steel Braided lines covered with a groundbreaking protective layer of HYTREL® from DuPont to replace your worn and restrictive OEM hard lines that run from the fuel bowl to the driver and passenger side heads. This allows you to move from the problematic stock Vibra-Loc® sleeves to a leak proof JIC adapter for long term security against the possibility of a leak. 

Our SS Braided Fuel Line Kit also solves the issue of pedestal interference on the OEM passenger side metal hardline when you convert to a T4 Turbo kit. This kit covers the fuel lines from your 1999-2003 7.3L Fuel Bowl to the fuel rail in the cylinder heads. 

Made in the USA

Installation Note - Do Not over-tighten the 90º elbow that is installed into the fuel bowl. It is a tapered thread, and if over tightened can crack the fuel bowl.


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  • 5
    Heavy Duty Fuel line Kit

    Posted by Ryan on May 10th 2024

    Well made, heavy duty fuel lines that are way better than the stock hard tubing. No more leaks, and not more seals to leak later. Install was straight forward and instructions were helpful.

  • 5
    Fuel lines

    Posted by JAY on Apr 29th 2024

    Haven't installed yet, but they look great and excited to install, great product

  • 5
    Fuel feed lines

    Posted by JAY on Apr 29th 2024

    Awesome !!! Solved my leaky old OEM fitting and had chance to clean up the valley. Perfect fit, added wiring loom and taped that up also should be good for a long time, Thank you riffraff

  • 4
    Braises Hose Fuel Line kit

    Posted by Alex Curtis on Apr 18th 2024

    Good Points:
    Good Quality, everything included.

    Bad points:
    Instructions. Rear passenger line difficult to access with the the turbo in place. Needs a stubby wrench or a crow's foot for removal/installation. Consider cutting the stock line with a hacksaw blade, then you can use a deepwell socket and a flexible head for stock items removal.

    Front (driver side line): Very difficult to without cutting the stock line. Consider removing alternator/hydraulic pump bracket (at least the alternator). The other consideration is removing the fuel bowl and oil reservoir as one unit for access.

    Great product, but not easy to install.

  • 4
    Product is good. Instructions need a re-write.

    Posted by JASON WILD on Apr 9th 2024

    Once installed, product has successfully stopped a pesky fuel leak. Installation instructions include a number of errors and omissions. This is an annoyingly tedious job already, and will be much more annoying if you don’t remove the downpipe and alternator/pwr steering pump bracket to access the head connections. It will help if you are built like Manute Bol, but with tiny hands since the rear head connection is in a horrible location. Wrap your new lines in split 3/8” heater or vacuum hose to prevent chaffing as they rub in a number of places. As expected, I have detected zero performance improvement with stock injectors and turbo. This was all about fixing a leaking line. Time will tell on durability but it all looks good so far.

  • 5
    Awesome product

    Posted by James D on Apr 2nd 2024

    Finally got The FRX and Stainless Steel Lines installed along with a T-800 from Joey. Have to say everything fit perfectly and has made quite a difference in the overall drivability of the truck. Im using the Gold Spring but still holding 70psi fuel pressure. Riff Raff makes some amazing products.

  • 5
    Fuel feed line

    Posted by Colby Ingram on Mar 29th 2024

    Awesome product cleans up the engine bay a little 100% leak free and easy to install

  • 5

    Posted by Unknown on Mar 19th 2024

    Great product. Can be done without pulling the spider and sensors but makes it way easier if you do. Great modification to a known 7.3 problem spot

  • 5

    Posted by LAWRENCE KELLY on Mar 5th 2024

    Another great product as we work to restore our F350 dually!