There's no such thing as a free lunch. Free-er flowing filtration means
more contaminants in your engine. Also, ever try cleaning and re-oiling
a K&N filter? It's a supreme mess. All that hassle, the risk of
allowing more crap into your engine, and you *might* get a couple of HP
out of it. Hardly seems worthwhile to me...
I think for street driving you are correct but I do like the K&N for
off-road vehicles. They do trap dirt particles very well and though I
won't say they are far superior than paper filters its nice to able to
wash out a really dirty filter after a long weekend off-road.
Cost is a factor too... I installed the K&N's on my Jeep when it was
brand new and five years later with 77000+ miles I have the same
filter... It has paid for itself, including the extra $11 for the
cleaner/oil spray which I just ran out of for the first time.
'89 Audi 200
'03 Audi S6 Avant
'98 Jeep Cherokee Sport
No - I just saw an article about Audis air intake modifications. As many of
us think, that those filters improve performance, this article clearly
showed that there aint a bit difference between normal and "tuning" filters,
at least performance vise. Article measured air pressure before and after
filter and with normal/K&N filter. The difference was almost nothing. The
only difference I have noticed is the intake sounds improving, but is that
worth in normal traffic, where no one likes to hear those improved intake
air sounds after some days!
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