Vacuum Secondary Diaphragm
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Holley Vacuum Secondary Diaphragm

Part No. 135-3 Warranty Details  

Fit of this part varies by vehicle & equipment specs Type of Fit

Vacuum secondaries are activated by venturii velocity through the primary venturii and further aided by secondary venturii velocity. Engine/manifold vacuum is not related and has no effect on the operation of the carburetors secondary system.

Product Features:
  • Vacuum Secondary Diaphragm
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