I"M TIRE OF SEARCHING!!!! just to get me even more confused.

CAN I KEEP MY STOCK S5 N/A Wiring harness with my S5 TII conversion, or i have to buy the turbo one???
DO i have to rewire anything???

 

Thank you all

 

Yes, you can use it. Wire in a knock sensor, and IIRC there's one other wire to change. Check the FSM and compare the two and you should find the wires that don't match up.

 

I'm doing the same sort of swap. I've gotten an S5 jspec engine with the wiring harness. Though the wiring harness that came with the engine is missing one connector. It has 2 connectors for the ECU and then one yellow one. While the harness off of my S5 NA has an extra "golden" connector. I'm not sure what the "golden" one is for....

 

http://2ndgenrx7.freeservers.com/techmaster.html na to turbo swop instructions..