Holley Standard Main Jet #66
These metering orifices control fuel flow into the metering system and are essential components for carburetor tuning. Rated in flow capacity "cubic centimeters per minute", these jets are changeable for precise tuning purposes.
Key Features:
- Precision Manufacturing: All Holley Main jets are flow tested and then stamped with the correct number for accuracy
- Optimal Flow Design: The shape of the entry, exit, and size determines flow characteristics
- Easy Installation: 1/4-32 UNF thread design for straightforward installation and removal
- Quality Construction: Manufactured from brass to high tolerances for consistency
- Professional Grade: Suitable for both street and race performance tuning
Specifications:
- Hole Size: .066" (1.676 mm)
- Thread Size: 1/4-32 UNF
- Material: Brass
- Quantity: Sold as a pair
- Jet Number: 66
Compatibility:
Fits all Holley Model 2010, 2300, 4010, 4011, 4150, 4160 & 4500 carburetors.
Important Note: Jet hole sizes are provided for reference only. All Holley jets are sized by actual flow and may vary from nominal sizes. Not for use with carburetors originally designed for alcohol.