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
    Fuel Feed Lines

    Posted by 604Les on May 24th 2021

    Not a simple install, but not super difficult either. Fit great, and no more worry of the hard line rub through.

  • 5
    Installation tips

    Posted by Peter Greenberg on May 19th 2021

    I've always have done all my own work on my 2003 7.3. Riffraff sells only quality parts with fast shipping. I suggest rebuilding your fuel bowl and doing these fuel lines at the same time. I was able to easily attach the lines to the bowl. To install at the back of the head on the passenger side. I used a 1/2" socket to install the head fitting. I bent a open ended 9/16 wrench about 2 inches down. It worked like a champ on tightening the line to the head. On the front driver side install I used a dremel to cut the old line. Then using a 9/16 socket I was able to easily remove the old fittings. 1/2 socket to install the new fitting. Grab that bent wrench and tighten down the front line. I left my fuel bowl loose during this whole process to allow for movement to get the lines to easily go into place. I am no pro... but it all worked great with ni.leaks. hope these tips helps you out!

  • 5
    Fuel lines

    Posted by Mitch bryson on Apr 29th 2021

    Shipping was rite on and the quality of the product was also rite on thanks !!

  • 5
    If it has riffraff‘s name on it you know it’s good !

    Posted by jacob kepner on Apr 20th 2021

    Installed these along with the FRX couldn’t be happier ! Must have !

  • 5
    Fuel line ss braided 99 03

    Posted by Jerry k on Apr 7th 2021

    So much easier to install than the factory eq. Fittings made it easy to install, saved time and money.

  • 5
    Fuel lines

    Posted by BJ Chase on Apr 4th 2021

    They are awesome and do there job

  • 5

    Posted by Rick on Mar 7th 2021

    If your going for all black look and wanting fuel on demand buy this opens fuel lines up and flow like it should have from factory but wonderful job on the fittings great day in the fuel line custom

  • 5
    Quality parts.

    Posted by Dave on Mar 3rd 2021

    I am a repeat customer of RiffRaff Diesel and for good reason. They sell Quality Parts at a great price to fix the very few shortcomings on the 7.3L diesel. My truck now has 224,000 miles on it and still running great.

  • 5
    Installation of Driver Side and Passenger Side

    Posted by Danny Morrell on Mar 1st 2021

    Great product, good service. I needed these lines due to a brake down 500 miles from home. Installed the driver side in 2 hours in RV Park. I am now just getting ready to install the passenger side. Riff Raff Diesel came to the rescue with over night delivery on time next day air.