This Holley standard main jet controls fuel flow into the carburetor's metering system and is flow-tested and stamped with its correct jet number for accurate tuning.
Specifications:
- Jet Number: 59
- Jet Size: 0.058 in.
- Thread: 1/4-32
- Material: Brass
- Product Type: Standard Main Jet
- Part Number: 122-59
Fits Holley Model 2010, 2300, 4010, 4011, 4150, 4160, and 4500 carburetors. Sizes available from 40-110. Not for use with carburetors originally designed for alcohol. Jet hole sizes are provided for reference only — all Holley jets are sized by actual flow and may vary from the listed sizes.
FAQ
What carburetors does this jet fit?
Holley Model 2010, 2300, 4010, 4011, 4150, 4160, and 4500 carburetors.
Can this jet be used in an alcohol carburetor?
No, it's not for use with carburetors originally designed for alcohol.
What thread size is it?
1/4-32.
What size range is available?
Sizes from 40 to 110.

