I couldn't find any guides on dsmtuners or vfaq (probably because it's mostly straightforward;)), but I have only two questions before I start working on it: Is it better to do it from the top of the engine bay (taking off the heat shield) or under the car? Also, do I have to take the entire housing off? Thanks :bigthumb: :smile:

If you have an O2 sensor socket, it is fairly easy to do from up to with the housing in place.

I assume that silly heat shield needs to come off as well? :)

The heat shield has like what, 2 or 3 bolts? Take that bad boy off if it gives you more room to work!

I really hate the o2 socket it is PITA, IMO. I just used a 7/8" open end wrench.