I have a 2000 Civic Ex with a b16 sir-2 motor swap. The wiring I currently have is a SOHC Wiring harness to a P30 spoon ECU with the conversion harness. I recently bought a 2000 Si Wiring and dropped my car off to my mechanic and he said that he couldnt do it because nothing matches. What do I need to do to wire my car correctly with the si harness? Do I need a different conversion harness. Maybe a OBD2B? An Si dashboard harness? Or should I just use the wiring I have already? Please help me out in this, thanks alot guys.