I must be horrible at explaining myself...
Thanks for posting a pic Randy_k. Yep, #4 is what I removed. Did it yesterday. It was a beast! The passenger side intake manifold was already out, so the issue was could I remove this tube without removing the driver's side intake manifold. Ended up loosening the six bolts that hold it to the engine and just sliding it around in order to get at the the end that's connected to part #6. After that was disconnected, had to twist, turn, and rotate the tube to get it to sneak past all the other components to get it out. Putting the new one in was much easier, but only because of all I learned taking the old one out.