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
  • .1165" 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 Modules, Module Air Fuel Single Channel

    Racepak Modules, Module Air Fuel Single Channel

    $424.95

    View
    Fender Gripper Fender Cover, SVT Lightning Logo, Each

    Fender Gripper Fender Cover, SVT Lightning Logo, Each

    $55.50

    View
    MSD Cam Position Sensor, Cam Sync, Pro-Billet Plug, Melonized Gear, For Chevrolet Small/Big Block, Each

    MSD Cam Position Sensor, Cam Sync, Pro-Billet Plug, Melonized Gear, For Chevrolet Small/Big Block, Each

    $534.77

    View
    Scott Drake Classic Engine Coolant Filter Adapter, 8 Cylinder, Each

    Scott Drake Classic Engine Coolant Filter Adapter, 8 Cylinder, Each

    $130.48

    View
    Racepak Sunglasses, Racepak logo sunglasses.

    Racepak Sunglasses, Racepak logo sunglasses.

    $11.22

    View
    Hurst Manual Shifters, Billet Shifter Ball Silver, 6Speed

    Hurst Manual Shifters, Billet Shifter Ball Silver, 6Speed

    $85.03

    View