oil crossover-valve cover

Moper's right, it's a breather system. I don't know if road race cars are setup the same as drag cars but on drag cars you have the valve cover breathers plumbed into a one way valve located in the header that creates a vacuum to suck the vapors out. You have to have open headers for it to work though as any back pressure nullifies it's effect.

To post pictures you have to click on "go advanced" and then below the box you type the message in is a grey box titled "advanced options". In that box is a window called "manage attachments". Click on that and a window will appear that you can download your pictures in. Note that the picture size can't be real big or it won't accept it. If the picture is too big it'll tell you and you will have to re-size it.