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:
  • Standard Main Jet
  • .068" Jet size
  • 1/4-32 Thread
  • Sizes from 40-110
  • Fits All Holley Model 2010, 2300, 4010, 4011, 4150, 4160 & 4500
  • 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

    Proflow Holley Jets Size 72, Flowed, Brass To Suit Holley, Quick Fuel, Barry Grant, Sold As Pair

    Proflow Holley Jets Size 72, Flowed, Brass To Suit Holley, Quick Fuel, Barry Grant, Sold As Pair

    $16.50

    Quick Fuel Carburetor Jet Extensions, Screw-in, 1/4-32 in. Thread Size, Brass, Holley, 4150, 4500, Pair

    Quick Fuel Carburetor Jet Extensions, Screw-in, 1/4-32 in. Thread Size, Brass, Holley, 4150, 4500, Pair

    $20.20

    Proflow Holley Jets Size 76, Flowed, Brass To Suit Holley, Quick Fuel, Barry Grant, Sold As Pair

    Proflow Holley Jets Size 76, Flowed, Brass To Suit Holley, Quick Fuel, Barry Grant, Sold As Pair

    $16.50

    Quick Fuel Carburetor Jets, Gasoline, Brass, 1/4 in.-32, Sizes 80-90, Two of Each Size, Kit

    Quick Fuel Carburetor Jets, Gasoline, Brass, 1/4 in.-32, Sizes 80-90, Two of Each Size, Kit

    $128.09