Those suction pipes are the ones besides the plenum if i'm not mistaking. Those pipes i'm curious about are placed closer to the ic. Can see the small pipes coming up next to the headlight if you understand what i mean. I have a standalone pressure gauge inside the car. It shows about the same pressure as the original located in the dash. About 0,4 to 0,5 bars pressure. Think that i aprox 7 psi.