Any changes to intercooler plumbing causing more flow and less pressure?

I have take out the reroute from IC as first work when pressure was to low.Michael

I am a bit forward but still a question open.The 2 sensor from an outboard kit wie ending 881879 plus A20 and A16 are diffrent.
One is an 8M6000626 (also merc nr 881879T11) and work!!!
other is 8M6000629 and show same sign like the ones with 623 at end(start at only ignition at 30psi and go up.
Is it and interchangable sensor with 8M6000623 ???
I cant use but i am shure someone like to buy it as in many 496 350 mpi and so used.
Michael