Quote:
Originally Posted by whalepirot
The point is, the filter is barely, if at all, less restrictive than a clean paper filter, which is much less expensive. The hot air effect is as you aver.
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OK, I worked at K&N for three years and spent a lot of time in their labs. I don't want this to turn into a K&N commercial, so if anyone has any questions about their products, feel free to ask me offline. I use them on all our personal cars and have no qualms about using them on our Smart.
For the record, K&N filters flow significantly more air than pulp paper products (they are depth loading, as opposed to surface loading) and although a paper filter is in fact "much less expensive" it is also not a lifetime filter like K&N - so factor in the cost of replacement with this statement. Filtration efficiency is on par with, or better than, name brand paper filters.
So, at the end of the day, the K&N flows more air, never needs to be replaced, and filters as well or better than a quality paper filter. Yes, it costs more, but the added performance and longevity, for many users, justifies the higher price.
-- DavidV