Yep, I know it's a grommet. Do you suppose it's the grommet for a breather or did Mopar have a PCV that was that big. I ask because there is one hole on each valve cover. One is the fill and the other had this grommet. Maybe the guy that had them before me didn't run a PCV.
I'm planning on using a breather that doubles as a fill and will need a PCV valve to go into the other side. I was just wondering if a Mopar ever used a PCV that was this big. Then I would buy that PCV.
I've run the cast M/T Smblk and Bblk covers in the past, and yes that's the sized grommet supplied, if the covers are already cut to fit that grommet, you'll need PCV valve Fram FV184 or V194 IIRC
