As you probably don't know I have a complete changeover package coming (SiR I) from HMO thats going into my Si. I was just thinkin', does the pr3/pw0 ECU just plug into my factory wiring? I have a HASport V-tec sub harness coming with it. Also, are there any other wiring changes i must make (be it the ECUs just plug in) that I must address other than the 2nd O2 wire being run? Thanks, its my first swap and I could not find anything on this.