So off to Advance to fine the NTK O2 sensor is $54 and out of stock

Rock Auto has the part, $34 and $3 shipping. I add in a $3 PVC valve as I'm sure that's never been replaced either.
Next will be suspension... looking at tightening up the suspension.... so far Rock Auto is killing Advance in both parts and prices... even shipped. I just wish RockAuto had parts for G506/G508s.
Since there is FINALLY no snow on the ground I'll be rotating tires tonight. Yay PMs!