Overview

Engine Works Vacuum Secondary Diaphragms

Engine Works vacuum secondary diaphragms are made from a high performance rubber material and are ideal for replacing your existing worn-out diaphragms. As such, the secondaries open progressively as the engine requires more air and fuel to keep up with the throttle demand. As the secondary throttle blades open and air starts flowing, an additional vacuum signal is generated to the diaphragm to keep the secondaries open as needed. These Engine Works carburetor vacuum secondary diaphragms are compatible with most Holley carburetor models with vacuum secondaries.

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