yep ECU harness,wiper harness,ABS harness (in my case) and a resistor harness. so if ALL that is gone then I would source a 25 head with a manual harness attached to it. from there you are going to have to also find a 32 harness and mix/match the two. there is not a lot of difference in them but from an electrical point it would be better to have the 32 harness spliced on to the later RB25 item for circuit tracing when something goes bad.
also ECU choice - nistune would be my pick over the microtech item.