JEGS 15490 Phenolic Carburetor Spacer with a 4-hole plenum is made from thermoset plastic to provide a heat sink between an intake manifold and carburetor with a 4150/4160 series square bore Holley bolt pattern. This 1/2-inch tall spacer will help keep fuel cooler for a denser fuel mixture, reduce vapor lock, and add additional plenum volume to increase engine performance.
Features: