K&N passed MORE dirt/dust and plugged up faster than just about every
other filter tested.
(Arlen) SPICER wrote,
"Now that I am not doing the tests and my objectivity is not necessary,
let me explain my motivation. The reason I started this crusade was that
I was seeing people spend a lot of money on aftermarket filters based on
the word of a salesperson or based on the misleading, incomplete or
outright deceiving information printed on boxes and in sales literature.
Gentlemen and Ladies, Marketing and the lure of profit is VERY POWERFUL!
It is amazing how many people believe that better airflow = more power!
Unless you have modifications out the wazoo, a more porous filter will
just dirty your oil! Some will say " I have used aftermarket brand X for
XXX # years with no problems. The PROBLEM is you spent a chunk of change
on a product that not only DID NOT increase your horsepower, but also
let in a lot of dirt while doing it! Now how much is a lot? ANY MORE
THAN NECESSARY is TOO MUCH!
Others are persuaded by the claims of aftermarket manufacturers that
their filters filter dirt "better than any other filter on the market."
Sounds very enticing. To small timers like you and me, spending $1500 to
test a filter sounds like a lot. But if you were a filter manufacturer
and you believed your filter could filter dirt better than any other
media on the market, wouldn't you want to prove it? Guess what. Test
your filter vs. the OE paper. It will cost you $3000 and for that price
you will have the data that you can use in your advertisements. Your
investment will be returned a thousand fold! EASIER than shooting fish
in a barrel! So why don't these manufacturers do this? Hmmm? Probably
not because they would feel guilty about taking more market share.
Now I am not saying that ALL aftermarket filters are useless. A paper
filter does not do well if directly wetted or muddy. It may collapse.
This is why many off-road filters are foam. It is a compromise between
filtering efficiency and protection from a collapsed filter. Now how
many of our trucks collapse their filters from mud and water? However,
if a filter is using "better airflow" as their marketing tool, remember
this....Does it flow better? At very high airflow volumes, probably.
BUT, Our trucks CAN'T flow that much air unless super-modified, so what
is the point? The stock filter will flow MORE THAN ENOUGH AIR to give
you ALL THE HORSEPOWER the engine has to give. And this remains true
until the filter is dirty enough to trip the air filter life indicator.
At that point performance will decline somewhat. Replace the filter and
get on with it.