PCV Port

It is a twist on breather (bayonet)

I wonder if oreillys would have one of those things sitting on one of the racks, that would be nice.

The ones at the parts stores are cheap POS. For one thing, the bayonet tabs are cheap and bend, they don't stay tight and they leak. "Been there done that." I have no suggestions except "look for quality" The thing about using that type is it gives you a baffle "built in"