4 Wire O2 sensor, TECH NEEDED

I was wondering if anyone has changed their O2 sensor on the MKll to a universal 4 wire type. Diagram needed if anyone has it. Thank you for the help.

I am using an off-the-shelf GM O2 on my turbo MR2 ... if memory serves, the wires were a direct match.

The problem is the bung that is needed is different. My downpipe was made with a bung for the GM sensor - no way it would fit in the OEM location.

Im having a downpipe made with a bung in it. So it was a direct wire match in color? If you can, let me know what the part# is or what vehicle its off of. Thank you.