I'm doing an 99 Civic HB swap with a b18c5 motor with Civic body harness, 01 USDM b18c5 ECU and 99 USDM Civic SIR wiring harness. I have 01 type r cat. converter in the EK that I want to run through the floor into the ECU. My problem is that I need to trace the four wires. Can anyone help me by telling me where I can find the four wires or if anyone would have a better suggestion to solve my problem, please feel free.

Thanks in Advance

 

Newbie here please help