Edelbrock part 4204 Elite Series Short Push - In Breather is a die cast breather that will fit all existing Elite Series valve covers. The push - in mounting style is ideal for low - profile and center bolt Elite Series valve covers because they do not have internal clearance for the bolt - on style breathers. The lid is removable for oil fills, and the lower housing contains a reticulated foam element to allow gases through while trapping oil.