Thanks for the help guys. I'll get the O2 kit from AB.

 

I needed 1 upstream as thiefs cut through it when they tried to steal my cats...picked up a NTK. It arrived yesterday but won't get it in until the weekend as I don't care to pull the y-pipe and weld a new bung in during a snow storm this week..

 

I've been using Walker o2s for a long time now. No issues!

Had a DOA Bosch as well years ago, haven't bothered since I had saw a post praising the Walkers.