[BR3W CITY]

Pass-thru isn't a technical term, its just the easiest way I know to separate it from vented ones. (I'm assuming the cap doesn't have a breather?)

Reason I ask is that this has been another one of those topics that results in confusion; some vent the can, some vent off a port on the v/c or on the oil filler, others don't vent at all, and yet others run the LS6 setup as well as a combo of the above. I'm kinda searching for some consensus on what people think works. I was under the impression that without at atmospheric vent, the crankcase would be allowed to still come under vacuum.