I want to run some aftermarket valve covers but the issue of running breathers and taking out the PVC Valve becomes an issue. I was told on another site that removing the PVC valve and capping off the tube on the Cold air and running open breathers will be ok. There was a big write up about the PVC but the poster was confusing on if it was ok to delete the PVC or not. I just dont want to take off a factory item w/ out knowing it will be fine w/ the different set up. So is it fine to delete it and run open breathers or should I run closed breathers on my new valve covers and keep the line that goes from the valve cover to the cold air?