Yeah mine was holding 16psi of boost after the chip, the n75j has real benifits for the higher boost pressure, found this after a quick search on google.
"The N75J is part of the system that determines how much boost is held by the diverter valve. Often when you add a chip to a 1.8t powered VW, the increased boost needs a little more control to be smooth. The N75J not only lets the boost peak a little higher, but it also helps get rid of surging"
Also there is some info on dyno testing with the n75j and gave better boost controll and more power.
I want to fit one, but need to know if anyone else has had success with the n75j on an agu engine?
And is there an egr valve on the agu?