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
  • .147" 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

    Racepak Accessories, Sd Memory With Cover 16Gb

    Racepak Accessories, Sd Memory With Cover 16Gb

    $73.80

    View
    Holley Fuel Cell Pickup, Hydramat, Cross, 8 in. x 15 in, Offset 3/8 in. NPT Fitting, Each

    Holley Fuel Cell Pickup, Hydramat, Cross, 8 in. x 15 in, Offset 3/8 in. NPT Fitting, Each

    $481.85

    View
    Halibrand Wheel, Sprint W/ Spinner Lug Cover, Anthracite

    Halibrand Wheel, Sprint W/ Spinner Lug Cover, Anthracite

    $75.50

    View
    Lakewood Driveshaft Safety Loop, Bolt-On, Zinc Plated Steel, For Chevrolet, For Pontiac, Each

    Lakewood Driveshaft Safety Loop, Bolt-On, Zinc Plated Steel, For Chevrolet, For Pontiac, Each

    $147.98

    View
    Scott Drake Classic Armrest Pad, Deluxe, Vinyl, Front, 68 For Ford Mustang, Passenger Side, Maroon, Each

    Scott Drake Classic Armrest Pad, Deluxe, Vinyl, Front, 68 For Ford Mustang, Passenger Side, Maroon, Each

    $152.91

    View
    Scott Drake Classic Book Reference, 1968 Mustang Chassis Assembly Manual, Paperback, Each

    Scott Drake Classic Book Reference, 1968 Mustang Chassis Assembly Manual, Paperback, Each

    $32.71

    View