PCV hose diameter?

Originally Posted by bcfromfl

I've tried to use the search extensively, and haven't found an answer. I'm upgrading to TopZ's A2A system soon, and am going to add a dual catch can system with breathers. I found a good-looking catch can from Damond Motorsports, and they have two models: one with 3/8" barbs, and the other with 5/8".

The only somewhat helpful info shows PCV hose sizes for our car in mm, but I'm still unclear. Also, the FSM is no longer online (at least where I can find it). Which would be the best match...3/8" or 5/8"?

My speed shop recommended using MickeyMouse catch cans, but I can't get them to respond to their web form for questions. Anyone have an alternative phone number for them?

Thanks!