im building a mini-me with an rebuilt a6 block and a Y8 head. converting to odb1 via convertion harness and running a phearable ecu. i just wanted to know if i needed to run a 4 wire o2 sensor or can i keep with the odb0 one wire sensor. my harness has the 4 wires coming off it for the 4 wire o2 sensor but none of the write-ups i have read say anything about swapping o2's. all the searches i pull up are for B16's dual o2's. thanks in advance guys..