welll that is a TIAL 35 or 38 MM external valve type wastgate...
and that is a s13/s14 sr20det fuel rail with stock fpr. the injectors look s15 or they could be aftermarket 740s or they could be ka24de, i cant really get a look at the color.
I would get them flow tested and cleaned either way if "they wer dropped at my door"...
