Re: WBO2 sensor position.
I have ran a PLX M-300 WBO2 in my PTE downpipe O2 location, replacing the stock O2 sensor for about 3-4 years now and 10's of thousands of miles including a few tanks of leaded race fuel. Even though it is a lot closer to the turbo than 24", I haven't had any problems. So take that for what it's worth.