Actually, you can see the ADBV THROUGH the little holes. Orange is the color you want to see there. That means it's a Silicone Rubber instead of Nitrile Rubber. SR = BETTER! (doesn't harden as easily and remains more "pliable" in extreme cold) No need to take the filter apart for that Next dissection- A John Deere filter. (PS you already have a head start) Now I'm wondering if a lot of Kohler hydraulic lifter start up noise might be caused by using a JD or FRAM filter?