WILLYS CARB WCD21 WILLYS CARB WCD21 A2 Secondary Metering Block Valves for 4BBL Carburetors, Alcohol, Brass Pair

The WILLYS CARB WCD21 A2 Secondary Metering Block Valves are designed for 4BBL carburetor applications using alcohol-based fuel. This matched pair provides secondary-side metering control for carburetor tuning and fuel delivery adjustments. Constructed from brass, these valves offer a durable solution for performance carburetor service and replacement needs.
The WCD21 metering valves are calibrated for a 0.140–0.156-inch range and are intended for secondary metering block use. Their A2 configuration helps support consistent fuel metering when properly matched to the carburetor, engine combination, and fuel system requirements. Verify carburetor compatibility and tuning specifications before installation.
These WILLYS CARB valves are supplied as a pair for convenient replacement or setup work. They are not air-restricted and are suitable for builders, tuners, and technicians servicing alcohol-fueled 4BBL carburetors. The brass construction and application-specific design make the WCD21 a practical choice for maintaining reliable secondary fuel metering performance.

Features:

• Brand: WILLYS CARB

• Part Number: WCD21

• Application: A2 secondary metering block valves for 4BBL carburetors

• Fuel Type: Designed for alcohol-based fuel applications

• Material: Durable brass construction

• Configuration: Supplied as a matched pair

• Metering Range: 0.140–0.156 inches

• Air Restriction: Not air-restricted