Fuel Pressure Regulator Vacuum Connection

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I have the Aeromotive A1000 FPR and was not quite sure where to get vacuum from to it. I have the Kenne Bell 2.8H would it come from the discharge plate [5](boost guage, frps, etc) or the upper connection [2]

 

[Tractionless1]

5 closest to the same orifice size as the FPR, smaller tend to be quicker responding as well.

 

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ttt