The 4 inch aluminum intake tube on the turbo has two vacuum lines going to it. One of the lines is from the checkvalve unit that goes under the manifold, and the other line goes to the crankcase tube. Off of the "Y" piece the one hose goes to the pcv valve and off of the other end goes to the intake tube for vacuume.

Next the the intake tube you will see a can with a breather on it. Both lines goto each vavle cover. Some say that there needs to be vacuum but i know for a fact that it is not necessary. Also i just noticed that ESX does the same thing with a breather on there 500 and 740 kits. I was beginning to doubt myself until i saw there breather box.