I need an O2 sensor. I've checked eBay and they vary from 19 to 130+, any to steer clear of or anyone have an old one they don't need. It's so I can weld a thread and fit one to the Cat DP
I have which doesn't have one so I can use it on the road, leaving the de-cat for track use. To fit a 97 type R, 3 wire type, it's a 4 wire plug with one empty.

Cheers