Holley Main Jets 99 Pair #122-99

In stock

Holley Carburetor Jets, Number 99, Hole Size .126", Set#122-99

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.


  • Fits All Holley Model 2010, 2300, 4010, 4011, 4150, 4160 & 4500
  • Sizes from 40-110
  • 1/4-32 Thread
  • .126" 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.

Specifications :

Part Type: Carburetor Jets

Product Line: Holley Standard Main Jets

Jet Fuel Type: Gasoline

Jet Size: 99

Jet Drill Size: 0.1260"

Jet Material: Brass

Thread Size: 1/4 in.-32

Quantity: Sold as a Set.

Special Attention: Not for use with carburetors originally designed for alcohol.


More Information
Part Type Carburettor Tuning Components & Tools
Product Line Carburettors & Accessories
Brand Holley
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