These metering orifices control fuel flow into the metering system. They are rated in flow capacity "cubic centimeters per minute" and are changeable for tuning purposes. The shape of the entry, exit, and size determines flow. All Holley Main jets are flow tested and then stamped with the correct number.

Click on Catalog Product Page for complete listing of jets and sizes.

Features:
  • Fits All Holley Model 2010, 2300, 4010, 4011, 4150, 4160 & 4500
  • Sizes from 40-110
  • 1/4-32 Thread
  • .064" Jet size
  • Standard Main Jet
  • Jet Hole sizes provided for reference only . All Holley jets are sized by actual flow and may vary from sizes above.
  • More From This Category

    NOS Quick Release Hinged Aluminium Bottle Brackets for 10 lb & 15 lb Bottle. Fits 7in. Diameter Bottles

    NOS Quick Release Hinged Aluminium Bottle Brackets for 10 lb & 15 lb Bottle. Fits 7in. Diameter Bottles

    $393.02

    View
    Scott Drake Classic Carpet, Complete, Loop, 1965-1968 For Ford Mustang Convertible, Black, Set

    Scott Drake Classic Carpet, Complete, Loop, 1965-1968 For Ford Mustang Convertible, Black, Set

    $356.73

    View
    AEM Fitting, 90 degree banjo

    AEM Fitting, 90 degree banjo

    $43.37

    View
    Holley EFI Fuel Injection Wire Harness, HP, Dominator EFI,

    Holley EFI Fuel Injection Wire Harness, HP, Dominator EFI,

    $181.21

    View
    RaceQuip Helmet Supports Sfi, Sfi 360 Helmet Support Lrg 17 In. Blk

    RaceQuip Helmet Supports Sfi, Sfi 360 Helmet Support Lrg 17 In. Blk

    $73.64

    View