Holley Jet Assortment (64-81)

The Holley Jet Assortment (64-81) from Advanced Engine Design is a comprehensive tuning solution for carburetor enthusiasts and engine builders working with classic Holley carburetors across the 1964–1981 model range. This assortment exists to solve a critical problem: finding the correct jet size for fuel and air metering during carburetor rebuild, restoration, or performance calibration. Whether you're restoring a vintage muscle car, tuning a street engine, or dialing in peak performance on a dyno, having a range of jet sizes on hand eliminates guesswork and multiple shop visits for single components.

Holley jets control fuel delivery through precisely calibrated orifice sizes, measured in numbers that directly correspond to flow rates at specific pressure differentials. The jet assortment includes multiple sizes that allow you to adjust the air-fuel ratio for idle, cruising, and wide-open throttle conditions without replacing the entire carburetor body. Advanced Engine Design has engineered this selection to cover the most common application needs across four decades of Holley carburetors, ensuring compatibility with both two-barrel and four-barrel configurations. Each jet is manufactured to strict tolerances, maintaining repeatability and reliability across your tuning window—critical for achieving consistent cold-start behavior, cruise economy, and peak horsepower delivery.

This assortment serves carburetor builders, engine tuners, and vehicle restoration specialists who demand precision control over fuel metering without fabricating custom jets or settling for oversized/undersized compromises. Real-world application spans street machines, race cars, marine engines, and classic truck restorations—anywhere a Holley carburetor from the 1964–1981 era demands quick, accurate calibration. The compact, portable format (0.6 lbs, 6.05 x 2.5 x 11.9 in) stores easily in a toolbox or shop drawer, making it an essential reference kit for any serious carburetor work. Installation requires no tools beyond basic carburetor disassembly; jets swap out in minutes once the bowl is removed, allowing rapid testing and validation of your tuning strategy on the dyno or during road testing.