heres a vid of when i first got it running. yes its the n/a harness.
the bay looks nothing like this now.
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the engine came with a boost sensor and afm hooked to hks intake filter.also on the ecu n374 there is a black box conn bolted on the side,whats that

 

yeah but if your gonna put the s5 engine in the s4 you cant use the s5 boost sensor or afm.
i believe the black box your talking about is the fuel pump resistor relay. the s4 doesnt need one as it sends 12volts to the fuel pump constantly.

 

I see the difference in the omp,couldnt i put the s4 one instead maybe bend the rod,or just block off and mix oil

 

yeah you could always premix. and yeah i just bought an s4 tyurbo OMP off ebay and swapped that bitch right on. i had to do some fabbing **** to make the lines all line up but that was probbably one of the easiest parts.
your still gonna need the turbo oil return tube from and s5 and s4 turbo.