I myself like the stock on a all motor set up it works fine...but as for the useing thedrain plugs as a breath is just wrong,when you take tho big plugs out and you look how the oil drains down thos it is made to back up do to the super amount of oil draining down so if you use thos plugs the oil will build up and can filll you can faster..i like the valve cover type but lol 4 is over doing it it looks dumb and is over kill..and yes there has to be a hose running to the intake that is what pulls the pressure out faster...that is why i tell rivers PLEASE PLEASE DO NOT put a autozone lil filter on the valve cover it must be in the intake tube to pull move vacumm faster..but thats me