I'm not sure if saying this makes since but from past experience messing with filters on other applications I'm assuming the filter is flexing under pressure. What I mean buy this is at a certain point inside the box the air pressure is causing the fliter to flex allowing the engine to pull dirt, dust or sand past its seal. I'd love to be able to wait and not have to replace the entire air system but I've never been known for being patience. Lol How long are you thinking? If keeping my existing box was an option then I would just run an intake from it into the bed and add a extra filter for the added insurance.