Holley 135-2 Carburetor Accelerator Pump Diaphragm

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.

• Vacuum Secondary Diaphragm
• Vacuum Secondary Diaphragm; Carburetor Model Numbers R1848-1/R3220/R6299-1/R8007;
• Holley Performance Emission Code 5: This part is legal for sale or use on Emissions Controlled Vehicles; Uncontrolled (Non-Emissions Controlled) Vehicles; and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations
• Vacuum Secondary Diaphragm Carburetor Numbers R1848-1 R3220 R6299-1 R8007; rod length is 2.047in.
• Vacuum Secondary Diaphragm
• Gaskets