Metering Block

The Holley Metering Block (HLY134-9) is a precision fuel system component specifically designed for tuning Holley four-barrel carburetors in classic and high-performance vehicles. This metering block is essential for regulating fuel flow and optimizing the fuel-to-air mixture, ensuring optimal performance in various driving conditions.

Constructed from machined aluminum, the metering block features internal galleries and orifices that deliver consistent fuel atomization, which is crucial for maintaining idle quality and transition response. Its compact design allows for easy integration into Holley carburetor assemblies, while its durability ensures thermal stability during extended use.

Ideal for automotive enthusiasts rebuilding or upgrading their Holley four-barrel carburetors, this metering block enhances fuel delivery and drivability across the RPM range. Whether restoring a vintage muscle car or fine-tuning a street rod, this component is vital for achieving peak engine performance.