I have a Hahn knock off CAI, opened hood and found air filter lying in the metal base. Seems the rubber flange just disintegrated, probably sun, heat, or some rough roads, but for whatever reason, it failed.
Looking at the K&N website, I can't find one that has a 3" opening. My pipe from engine to filter is 3" outside diameter.
Supplier used filter that was 6" long, and 4.75" around, rubber flange was 3" ID to fit over the inlet pipe.
Attached a couple pictures for reference.
Thanks for suggestions.