Ok, I'm swapping an s4 motor into my fb, and somewhere between my buddy removing crap from the donor csr, he lost the fuel injectors. So now, I have to get some injectors. The donor car is an 87 n/a car. My question is, what injectors do I need to get for it? I want stock injectors, which I understand are typically low impedance 460cc injectors. The problem I have, is that people selling injectors have 4 injectors with the plug on all 4 looking the same, but the harness that was removed from the car has 3 pairs of connectors that look like they would go to fuel injectors. Which 4 actually go to the fuel injectors? What injectors do I need to buy? And lastly, what do the last pair of connectors go to? (If anything)

These are the plugs I have. notice that the red ones have offset grooves that are both to the same side, the gray ones have center grooves, and the dark green ones have offset grooves to opposite sides.

one is for bac the other is for, i believe, the coolant sensor at the back of the front cover. just get the ecm wiring diagram and match the wires to find out exactly which go where.
and yes. should be low impedence

Ok, I'm guessing the 4 for the fuel injectors are the red ones and the gray ones, but that still means I would have to get 2 center groove and 2 offset groove injectors? Aren't those different impedances?

see, by that^ i have 2 n/a high impedance injectors and 2 turbo low impedance injectors? im lost...

ok, i have confirmed with the FSM wiring diagram and the gray/tan connectors are the secondaries, and the red connectors are the primaries.. but still this means i need 2 low impedance turbo injectors and 2 high impedance n/a injectors, correct?

well, digging further into my harness, i answered my own question. the connectors for the primaries have been cut and newer ones spliced on.