Metering Rods - .073 x .042

The Metering Rods - .073 x .042 by Edelbrock (MPN 1455) are precision fuel delivery components designed for carburetor tuning and optimization. These brass rods are essential for enthusiasts and mechanics seeking to fine-tune air-fuel mixture ratios on Edelbrock carburetors, particularly when building high-performance or modified engines. Whether you're restoring a classic muscle car, upgrading a street engine, or dialing in a competition carb, metering rods determine how much fuel flows at different throttle positions—directly impacting throttle response, fuel economy, and engine performance.

Metering rods function as variable-orifice fuel restrictors inside the main fuel circuit of a carburetor. The .073 inch outer diameter and .042 inch inner diameter specifications determine fuel flow rate at cruise and part-throttle conditions. Edelbrock manufactures these rods from brass—a material chosen for dimensional stability, corrosion resistance, and compatibility with gasoline. The pair configuration allows for dual-circuit metering on four-barrel carburetors or matched setups on two-barrel applications, ensuring balanced fuel delivery across all cylinders and consistent engine behavior across the RPM band.

Engine builders and carburetor technicians rely on metering rod selection to compensate for altitude, fuel type, intake manifold design, and cam timing changes. When swapping carburetors, upgrading ignition systems, or modifying engine displacement, rod selection becomes critical to maintain proper jetting. The Edelbrock 1455 metering rods fit Edelbrock four-barrel and select two-barrel carburetors; verify your carburetor model number and fuel circuit design before ordering. Installation requires basic carburetor disassembly knowledge and proper bowl gasket sealing to prevent fuel leaks and ensure accurate metering performance.