Complete Fuel Bowl Seal Kit w/ Fluorosilicone Drain Orings 99-03

Part Number:
GZ-7-003

Manufacturer:

$34.76

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

11 Viton o-rings and 4 Parker® fuel sleeves. 2 Fluorosilicone o-rings for the 7.3 yellow fuel drain valve core to fix your 7.3L Fuel Leak.

  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.

install.jpg

O-ring Identification Chart - Click Here

Write a Review

142 Reviews Hide Reviews Show Reviews

  • 5
    Fuel bowl seal kit 99-03

    Posted by Brad on Nov 12th 2025

    Good quality orings would buy again 100%

  • 5
    Fuel Bowl O'ring kit

    Posted by JJ on Oct 22nd 2025

    Finally a good set of proper o'rings and a size chart with descriptions! Quickly rebuilt my leaking fuel bowl and no leaks after two weeks.

  • 5
    Works as intended

    Posted by Blake on Oct 1st 2025

    High quality, everything fits and seals up as intended.

  • 5
    Complete kit, high durability, easy installation

    Posted by Monica Rey on Sep 25th 2025

    Complete seal kit for injection pump fuel bowls, including fluorosilicone O-rings resistant to modern fuels. Keeps your fuel system leak-free and reliable.

  • 5
    O ring fuel filter replacement

    Posted by Steven Dobie on Sep 19th 2025

    The O ring replacement was very easy. Instructions supplied were comprehensive. Great value for the money.

  • 5
    Muy Mucho More Gooder

    Posted by Sam Rock on Sep 9th 2025

    Clay and his team are the BOMB. The online instructions were on point with what we've come to expect from RiffRaff. The icing on the cake was the o-ring inventory print out included with the product that has ACTUAL size images of each o-ring printed on it to take the guess work out of which one goes where. Thanks Clay and the team for all that you do to keep our machines running strong!

  • 5
    Fuel bowl rebuild kit

    Posted by Rodney C Kuenzer on Jul 31st 2025

    The best kit I've found yet. Fast service and recivced fast. Will order more parts from this company.

  • 5
    All part worked as they should

    Posted by Michael Steinebach on Jul 24th 2025

    Parts are getting limited. So maybe buy more then one kit as back up, being as cheap as the kit is, it's a no Brainerd, however I wish I did

  • 5
    Great product

    Posted by Brandon on Jun 27th 2025

    Great price and worked as they shoukd