I've seen that some guys put on a baby crankcase line filter like these, K&N Crankcase Vent Filters
and then cap the inlet on the intake tube. Is this just an emissions only thing, or is it necessary for pressure equalization? My thoughts are that the way this large hose loops down low on its routing over to the intake tube on the NW's CAI, that any oil(if any at all) would have a place to collect, and checked/cleaned occasionally.