Interesting, in regards to water, that makes complete sense, however, I would have thought that the paper element (aFe, Airaid, K&N) would filter dirt better as I would think the pores in the foam would be larger than that of the paper. Shows what I know.
My three youngest boys race mx every weekend and practice 3 nights/week. We ran in a real dust bowl yesterday.You could hardly see the bikes sometimes. All mx bikes come from the factory with dual density foam filter. I wash and oil filters almost every night or two,...they do an outstanding job. The ones last night were plugged badly from the day,but washed out easily. I'm not saying one is any better than the other,just what I've done .
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