They've all got a PCV, it's the crankcase vent.
If the hose looks OK it shouldn't be causing a vacuum leak.
Might be worth checking the inlet manifold bolts if it's been removed, they don't need a lot of torque, just 18Nm.
Nice intake man what is it? and what's with the dodgy fuel rail connector?
Yeah, as said above it's a Fusion Fabrications cutom one, tried to acheive similar performance to the mountune one torque wise, gives a nice sound too. Dodgy pipe is the result of my clumsy spanner use, originally used hose just to get it running but it's just stayed like that since.