What do you think I'll pick up vs. a regular filter such as this one?

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In all seriousness, the K&N unit I have lying around had the foam piece off to the side disintegrate. What do you guys do when that happens? Buy a new one? Put a different piece of foam in there? I pulled the old piece of foam off of the crappy filter and put it in there next to where it draws the air on the air inlet side.