will be swapping a 00 civic hx, with a 00 civic si b16 complete swap, and exhaust along with the factory cat. are there any problems with the wiring i should know about before doing the swap. i know i can reuse the engine harness from the si and the ecu, which i was planning on doing. but i have one question, my car right now has all four plugs plugged into the ecu, and on the si there would only be three, whey is there a fourth clip? and does that matter after i do the swap.. thanks in advance...

 

no one has anything to add?????