Originally Posted by kpmatt00
Ok, I do understand that, what you are saying. There also seems to be no spot on the exhaust man for an o2 sensor to plug in...I know where the old one was, and I see nothing. I was wasnt thinking before, trying to write and work at the same time in hopes to fix this so I can drive it to get it tuned sat.
On the USDM WRX, the front O2 sensor mounts in the up-pipe before the first catalyst. On the JDM ver8 with twin scroll, the front O2 sensor mounts in the top of the downpipe, just after the turbo. This is before the first catalyst in the downpipe.