Hi,   Has anyone here in the group/nz has one of this air oil separator installed in their car?, I have an A-Line v11 sti and looking into upgrade some of the things in it not to get power (its an auto so notmuch point) or what not but just to have it running smoothly and can avoid “bad rings” to happen. Ive been researching about it and a lot of people said that its beneficial especaily for stock ones. I am just not 100% sure if its a go too. How does a catch can work?   P.S i am no mechani