Holley 122-99 | Carburetor Metering Jet

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

• Holley Performance Emission Code 5: This part is legal for sale or use on Emissions Controlled Vehicles; Uncontrolled (Non-Emissions Controlled) Vehicles; and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations
• Standard Main Jet
• Jets; Bleeds
• Sizes From 40-110
• 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.
• Carburetor Jet; Standard Main Jet; 1/4-32 UNF Thread; Hole Size 0.1250 in; Pair;
• 0.125 in. Jet Size
• 1/4 in.-32 Thread
• Fits Models 2010/2300/4010/4011/4150/4160/4500
• Carburetor Jet