so right now, my car is taken apart. While in N/A, I was using a valve cover breather filter, but now I'll be going turbo, so what should I do with the valve cover breather? Should I leave it on or do I need a catch can or something?

 

i dont know for sure, but ive been people leave them on with turbo's

 

Keep it, you will need it when you hook up the catch can to your PCV system.