Holley - 122-78
Carburetor Jet - 0.087 in ID - Number 78 - Brass - Holley Carburetors - Pair
Carburetor Jet; Standard Main Jet; 1/4-32 UNF Thread; Hole Size 0.0890 in; Pair;
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
- .089" Jet size
- 1/4-32 Thread
- 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.
- Standard Main Jet
Brand: Holley
Emission Code: 5
Jet Number: 78
Jet Size: 0.089 inch
Product Type: Standard Main Jet
Warning: California Proposition 65
Warranty: Limited 90 Day
