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
  • .041" 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

    Holley Air Bleed, Replaceable, 10-32, Size 36, Set of 10

    Holley Air Bleed, Replaceable, 10-32, Size 36, Set of 10

    $32.61

    View
    Quick Fuel Air Bleed Assortment Kit, .025in. - .035in., suit Brawler Carburettors

    Quick Fuel Air Bleed Assortment Kit, .025in. - .035in., suit Brawler Carburettors

    $103.43

    View
    Holley Standard Main Jet, Carburettor, #95, .1165 in., Pair

    Holley Standard Main Jet, Carburettor, #95, .1165 in., Pair

    $17.51

    View
    Holley Emulsion Jet, Carburettor .064 in., Pair

    Holley Emulsion Jet, Carburettor .064 in., Pair

    $20.06

    View
    Quick Fuel Standard Main Jet, Gas, #82, .082 in., Pair

    Quick Fuel Standard Main Jet, Gas, #82, .082 in., Pair

    $14.06

    View