Carburetor Standard Main Jet - 122-57

Carburetor Standard Main Jet - 122-57

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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.


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

Year Make Model Submodel Engine Size

Brand Holley
Emission Code 5
Jet Number 57
Jet Size 0.056 inch
Product Type Standard Main Jet
Warning California Proposition 65
Warranty Limited 90 Day

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