Name for center pipe under Air intake can

[Mattbob]

I took the can off to attach my beefier negative ground cable to one of the intake bolts. Nice cake of oil on the whole thing. I had replaced the 'return' hose going back to the oil pan. I will now permatex the other thing, that doesn't seal very well. I looked inside the intake to see a cake of oil on the inside, just in the center. where the intake splits to go to the engine there is a center pipe that goes to the exhaust. I tried to clean it up as much as I could thorugh the little hole. dribbled some diesel in there to see if it could pass through, it could not.

What is the center pipe? See as it goes to the exhaust, does it need to be diassembled and cleaned?