Holley main jets are metering orifices that control fuel flow into the carburetor's metering system for tuning purposes. Each jet is flow-tested and stamped with its correct number to ensure accurate, repeatable calibration.
Specifications:
- Category: Air and Fuel Delivery
- Jet Number: 53
- Jet Size: 0.052 inch
- Material: Brass
- Product Type: Standard Main Jet
- Sub Category: Carburetion
- Thread Diameter: 1/4-32
- Part Number: 122-53
Fits Holley Model 2010, 2300, 4010, 4011, 4150, 4160, and 4500 carburetors. Not for use with carburetors originally designed for alcohol.
FAQ
What carburetors does this jet fit?
Holley Model 2010, 2300, 4010, 4011, 4150, 4160, and 4500 carburetors.
What size is this jet?
.052 inch jet size, jet number 53, with a 1/4-32 thread.
Can this jet be used with alcohol fuel?
No, it is not for use with carburetors originally designed for alcohol.
What is the jet made from?
Brass.
How are Holley jets sized?
All Holley jets are flow-tested and stamped with the correct number; listed hole sizes are for reference only and actual flow may vary.

