650-850 CFM Primary Metering Block

The 650-850 CFM Primary Metering Block from Advanced Engine Design is a precision aluminum fuel regulation component designed for high-performance Holley 4150 carburetors. This product is ideal for engine builders, carburetor tuners, and performance enthusiasts who require reliable fuel delivery under various driving conditions.

Constructed from aluminum and finished with a chromate coating, this metering block ensures corrosion resistance and maintains dimensional stability. It effectively regulates fuel delivery to the primary circuit, optimizing performance across the 650–850 CFM flow range. The precise calibration of jets and ports allows for consistent fuel atomization, which is crucial for achieving optimal drivability and fuel economy.

This metering block is perfect for a variety of applications, including street rods, truck restorations, and drag racing platforms. Its compact dimensions and lightweight design facilitate easy integration into existing Holley 4150 carburetor setups without modification. Whether upgrading or replacing worn carburetor internals, this product meets the needs of performance enthusiasts seeking enhanced fuel regulation.