I have brought this up in the forums before and I believe this to be the best oil catch can setup you can do. I used the best locations I could for this type of setup and the OCC I had. For the PCV catch can, I was inspired by a post from @sLick415 which gave the best location for a stealth setup for Cali smogs. Ther are a few others on here who have adapted this location and they are the following. @Tekken @tacopyro @HappyDad701 @tri4all For the CCV I was doing research online and came across two images that show a catch can on the breather hose. This a vacuum on WOT which the prius is usually high rpms and I have a bored TB. So I have done a setup with both. I know @danlatu had some ideas with messing around with putting another PCV on the valve cover or relocating it to the breather hose. I managed to do this without removing the intake manifold and in the near future will be updating the intake manifold to the latest version. Stay clean!!!
Here is an example of what my setup is. Also two images of the internals of the oil catch cans I have currently, I do plan on changing them later on. Then a few images of others in Japan doing this on the CCV.
Last image was supposed to be this uploaded by @RightOnTime if I remember correctly. Before I saw this image I was thinking something like this type of setup for the CCV.
CCV is meaning Crank Case Ventilation? Maybe valve cover breather is more to the point? I don’t think there’s much (if any) oil coming from that. It feeds into the large diameter hose directly before throttle body, always been completely clean in my experience. the hose from PCV (Positive Crankcase Ventilation) is another story, that’s where I would invest in oil catch can, a quality one, or even two in series. those screw clamps on the barb connectors can be left off: the barbs alone are effective seals with properly sized hoses, and the clamps are detrimental to hose-end condition.