Complete Fuel Bowl Seal Kit 99-03

Part Number:



Complete Fuel Bowl Seal Kit for Ford 7.3L (99-03) - GZ-7-003

11 Viton o-rings and 4 Parker® fuel sleeves. 3 Viton (type A) or 3 Viton (type B) or or 3 Fluorosilicone o-rings for the 7.3 yellow fuel drain valve core

  1. 1 o-ring for the drain valve stem
  2. 2 o-rings for the drain valve to bowl seals
  3. 2 o-rings for the Water-in-Fuel sensor/Fuel Heater
  4. 1 o-ring for the Fuel Pressure Regulator housing
  5. 1 o-ring for the regulator piston bushing
  6. 2 o-rings for the fuel back check piston assembly
  7. 2 o-rings for bowl plugs
  8. 2 - 1/4" sleeves for the fuel lines feeding the cylinder heads
  9. 1 - 5/16" sleeve for the fuel return line
  10. 1 - 3/8" sleeve for the fuel feed line.

Order of 1 is a set of 11 o-rings and 4 sleeves.

NOTE: This kit does not contain the REGULATOR POPPET SEAT. This is a separate kit only available as a FORD kit. The Regulator Rebuild kit can be purchased separately as F81Z9B249BB on our website.
NOTE: If you remove the fuel rail lines from the cylinder heads, this kit contains the fuel sleeves for the filter bowl ends only. It is recommended to also replace the sleeves on the cylinder head end of the fuel rail lines once they have been removed as they will no longer seal properly.  Order part GZ-7-004 to supplement this kit.


O-ring Identification Chart - Click Here

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  • 5
    Awesome set

    Posted by Dave on Jul 10th 2020

    Very nicely packaged. Shipping was quick. Great quality materials. Riffraff is my go to when it comes to my ford. They never disappoint.

  • 5

    Posted by Matt Stowell on Jul 7th 2020

    Great product at a great price. Came with all needed O-Rings to seal the fuel bowl and stop those pesky leaks.

  • 5
    Great product

    Posted by scott on Jun 2nd 2020

    This was on time and very easy to put in.

  • 5

    Posted by Jared on May 10th 2020

    Has all the needed o rings to replaced the old, worn and leaking o rings in the fuel bowl. Fuel bowl doesn’t leak anymore!

  • 5
    Fuel bowl rebuild kit

    Posted by Stevie on Jan 5th 2020

    Great kit! Came with everything needed to rebuilt the fuel bowl

  • 5
    complete set

    Posted by george on Dec 28th 2019

    was able to completly reseal fuel bowl with this quality set

  • 5
    They work

    Posted by Tom on Dec 23rd 2019

    Good kit would be nice if it had the pressure valve seal but they are good quality worth getting

  • 5
    New O-rings

    Posted by Ted Seiler on Dec 10th 2019

    Got the wrong part at first and they were quick to remedy that! Great service and the new parts fixed my problem!

  • 5

    Posted by Bill Coleman on Dec 5th 2019

    I received the o-rings set in 2 days and they fit and are performing well. Seems to be good quality parts.