Holley Standard Main Jets - Size 59
Precision Fuel System Components
These metering orifices control fuel flow into the carburetor's metering system and are essential for optimal engine performance. Rated in flow capacity "cubic centimeters per minute," these jets are designed for precision tuning purposes.
Key Features
- Precise Flow Control: Flow-tested and stamped with correct number for consistency
- Easy Installation: 1/4-32 threaded design for simple installation and removal
- High-Quality Construction: Manufactured from brass to high tolerances
- Optimal Sizing: 0.058" jet hole diameter (Size 59)
- Versatile Compatibility: Fits all Holley Model 2010, 2300, 4010, 4011, 4150, 4160 & 4500 carburetors
Technical Specifications
- Thread Size: 1/4-32 UNF
- Jet Hole Size: 0.058" (1.473mm)
- Material: Brass construction
- Flow Rating: Size 59
- Quantity: Sold as a pair
Performance Benefits
The shape of the entry, exit, and overall size determines fuel flow characteristics. All Holley main jets undergo rigorous flow testing to ensure consistent performance and are ideal for fine-tuning carburetors for both street and racing applications.
Compatibility
Universal fit for gasoline-fueled vehicles with compatible Holley carburetor models. Not recommended for carburetors originally designed for alcohol fuel systems.
Note: Jet hole sizes are provided for reference only. All Holley jets are sized by actual flow and may vary from nominal sizes.