1 way servo + vaccum pipe

atm i still have the fuel pressure pipe connected from the fuel rail to the intake pipe

like so

i hear the best way of connecting it is not like that but straight to the 1way servo

like so

so my question is, what part number is the little 1way valve with the vaccum pipe on it.

i found these 2 from searching

90373359 2x13.5 connectors + 1 Vacuum
90497004 2x8.5 connectors+ 1 Vacuum

but dont know which i need.

cheers.

it really depends on the engine, some prefer it connected to the air intake, some connected to the servo pipe and others left disconnected.

there is not one correct way !

i go with the vacuum from the standard air intake pipe

i tried custom silicone, vectra c pipe, inlet manifold vacuum and atmospheric

u cant beat the pull from the standard setup imo