This Holley standard main jet is a metering orifice that controls fuel flow into the carburetor's metering system. It's rated by flow capacity and flow-tested before being stamped with its jet number for accurate tuning. It fits Holley model 2010, 2300, 4010, 4011, 4150, 4160, and 4500 carburetors.
Specifications:
- Brand: Holley
- Category: Air and Fuel Delivery
- Sub Category: Carburetion
- Product Type: Standard Main Jet
- Thread Diameter: 1/4-32
- Material: Brass
- Jet Number: 58
- Jet Size: .057"
- Part Number: 122-58
Not for use with carburetors originally designed for alcohol.
FAQ
What carburetor models does this jet fit?
Holley model 2010, 2300, 4010, 4011, 4150, 4160, and 4500 carburetors.
What jet number and size is this?
Jet number 58, .057" jet size.
Can this jet be used in an alcohol carburetor?
No, it's not for use in carburetors originally designed for alcohol.

