Holley Standard Main Jet 122-51
These precision metering orifices control fuel flow into the carburetor metering system and are essential for proper carburetor tuning. Each jet is rated in flow capacity "cubic centimeters per minute" and is changeable for tuning purposes, allowing you to fine-tune your carburetor for optimal performance.
Key Features
- Flow Control: The shape of the entry, exit, and size determines fuel flow characteristics
- Quality Tested: All Holley main jets are flow tested and stamped with the correct number for accuracy
- High Tolerance Manufacturing: Manufactured from brass to high tolerances for consistency
- Easy Installation: Threaded design allows for easy installation and removal
Technical Specifications
- Thread Size: 1/4-32 UNF (Unified Fine Thread)
- Jet Size: 0.050" (51)
- Material: Brass
- Quantity: Sold as a pair (2 jets per package)
Compatibility
Fits all Holley carburetor models:
- 2010, 2300, 4010, 4011, 4150, 4160, and 4500
Important Notes
- Jet hole sizes are provided for reference only
- All Holley jets are sized by actual flow and may vary slightly from listed sizes
- Not for use with carburetors originally designed for alcohol
- Legal for use on emissions controlled vehicles, uncontrolled vehicles, and racing applications