I already have my si harness converted to obd1 vtec so what im saying is the si and hf harness any different? Would I be able to take my si harness and plug to the hf without it throwing codes and the person who told me was Ryan from rywire so that's why I was thinking hmmm thats odd but he said he could do it for 50 bucks just send it to him whenever im ready to do it