Here is a pic of the front bumper
(took it jus now as it pitch dark, my phone dosnt doo well at nigh shots)
Here is a test which i just performed to check for leaks. normally i could hear it when it leaking when the car hits 2500rpm (sucking sound).
I disconnect the connector on top N75 valve and took it for a spin.
Well the car feels almost the same but no sucking sound, - my boost gauge still is running when floor it!
so any suggestions what pipes could be leaking? (taking in account i disconnected the n75 valve and the noise was gone)