I still swear by Uni...we ran a controlled lab test last year. Ran different sized dirt/dust/saturated dirt particles through each of the larger companies' filters (uni, k&n, twin air, pro design, stock 400ex). The k&n let almost all smaller sized dirt particles right through, don't want it cramming through my motor personally.
Uni's seemed to hold great, and I've always had awesome power gains with them.
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