Holley Standard Main Jets
Performance Tuning Made Simple
These precision-engineered metering orifices control fuel flow into the carburetor metering system. Each jet is rated in flow capacity "cubic centimeters per minute" and is designed to be easily changeable for precise tuning purposes.
Engineering Excellence
The shape of the entry, exit, and size determines flow characteristics. All Holley main jets are flow tested and then stamped with the correct number for accurate identification and consistent performance.
Technical Specifications
- Thread Size: 1/4"-32 thread for secure installation
- Jet Size: 71 (.0750" diameter)
- Material: High-quality brass construction
- Quantity: Sold as a pair
- Application: Designed for gasoline fuel systems
Universal Compatibility
Fits all Holley carburetor models including:
- Model 2010
- Model 2300
- Model 4010
- Model 4011
- Model 4150
- Model 4160
- Model 4500
Installation & Tuning
Threaded design allows for easy installation and removal during carburetor tuning. These brass jets are manufactured to high tolerances for consistency and reliable performance.
Note: Jet hole sizes are provided for reference only. All Holley jets are sized by actual flow and may vary from reference sizes. Not suitable for carburetors originally designed for alcohol fuel.