Originally Posted by RoCoBass
It is a Breather Filter, an element found inside the lower intake manifold inside the hole that you pull the pcv valve out of. You can extract it w/ a hook tool or by using a long screw 4-5 inches long. A replacement can be purchased for about $10.
I just cleaned mine with brake cleaner last time i rebuilt my top end, don't know if that was good lol
Could be part of my oil leak problems, figured it was my old oil pan gasket/leak at the drain plug which is minor