Yep, i didnt pull it out of the pipe when I did my jetta. I installed the shit and then read the instructions prior to firing it up. then was like WTF I have to pull it out?? Nahh air is in there anyways its close enough.
later on I pulled it when i was under it again, recalibrated it and the numbers were the same at idle, under boost, etc when I drove it around, never noticed a thing different.
unless your car is tuned for making you money at a race, or is tuned so close to the brink of destruction… anything above a GlowShift wideband will suffice… I will stick to Innovate or Autometer.