One or Two Breathers

Nope. Just screw in breather in place of oil cap.
I know it's a nice clean look - but it's not good for the street. You might want to read about PCV systems before moving too much further intoo this.. I run a pretty strong 360 on the street and it HAD dual breathers into the exhaust.. it was bad on the street. I retrofitted it back to PCV and have never looked back.