This standard main jet is a precision, flow-tested metering orifice that controls fuel flow into a Holley carburetor's metering system, letting tuners fine-tune air/fuel ratio for a specific engine combination. Each jet is flow-tested and stamped with its correct size before leaving the factory.
Specifications:
- Jet Number: 85
- Jet Size: .100"
- Thread: 1/4-32
- Material: Brass
- Fits Holley Model 2010, 2300, 4010, 4011, 4150, 4160 & 4500 carburetors
- Part Number: 122-85
Not intended for use with carburetors originally designed for alcohol. Jet hole sizes are provided for reference only, as Holley jets are sized by actual flow and may vary slightly from the listed dimension.
FAQ
What size is the 122-85 main jet?
It is a .100" jet, stamped as jet number 85.
What carburetors does this jet fit?
It fits Holley Model 2010, 2300, 4010, 4011, 4150, 4160, and 4500 carburetors with 1/4-32 threaded jet wells.
Can this jet be used in an alcohol carburetor?
No, it is not for use with carburetors originally designed for alcohol.
What material is the jet made from?
Brass.

