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The side of my filter says micronair. They work very well. 30 bucks under the boshe name at AutoZone.
If you want to extend the life of the filter, people may want to try putting a sponge filter (like those on a shop vac) on top of the filter to "pre filter".
I am not sure how effective it will be.
30 bucks every 9 months to breathe in my car is worth the money.
Joe
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