K&N Filters

[07WYarisRS]

have you ever wondered why you never see a K&N filter on any stock machine?
if they were so great why don't they use them
Simple
cotton filter are the worst filter type for filtering fine dust that will cause premature engine wear.
Even K&N recommends a foam prefilter for dusty conditions

do think you car sees much dusty conditions? don't wash under the hood for a couple months and look how much dust built up collects on the engine cover, not X that by XXXXXXXXXX the amount of air you engine sucks in everyday and think about how much of that dust is going into your engine.

As a motorcycle mechanic I have seen hundreds of engines destroyed by using K&N filters. #1 they do throw off the jetting sometime lean other times they reduce the intake velocity and cause the engine to run too rich or just poorly overall. Even FI bike need to have the fuel systems re-mapped for a K&N.

for you K&N owners take a clean white rag and go wipe out the intake pipe to the manifold and then tell us its clean in there. I have shown dozens of owners this for YEARS and most people withh agree they SUCK. if the MFG could gain and extra MPG from a different air filter don't you think they would have installed it?

[1stToyota]

Amsoil needs to get it in gear and release their Ea paper filter for the Yaris; guaranteed for 100K miles, and it's reusable...they say just vacuum it, shake it out, wipe down w/ soft bristle brush, etc...

Only cotton filter I ever liked was the one made by Green (big in Europe, I think)...its cotton was weaved, like bluejeans, not loose layering, and was supposed to filter better, but still not as good as paper.

[R2D2]

Originally Posted by 1stToyota

Amsoil needs to get it in gear and release their Ea paper filter for the Yaris; guaranteed for 100K miles, and it's reusable...they say just vacuum it, shake it out, wipe down w/ soft bristle brush, etc...

I couldn't agree more-those are great filters. I'd love to get my hands on one for a Yaris but I'm afflicted with this curse where they never offer one for the vehicles I end up buying!

R2

[1stToyota]

Originally Posted by R2D2

I couldn't agree more-those are great filters. I'd love to get my hands on one for a Yaris but I'm afflicted with this curse where they never offer one for the vehicles I end up buying!

R2

My brother bought one for his new Ranger; looked like a very good and durable filter.

[b_hickman11]

Originally Posted by 07WYarisRS

have you ever wondered why you never see a K&N filter on any stock machine?
if they were so great why don't they use them
Simple
cotton filter are the worst filter type for filtering fine dust that will cause premature engine wear.
Even K&N recommends a foam prefilter for dusty conditions

do think you car sees much dusty conditions? don't wash under the hood for a couple months and look how much dust built up collects on the engine cover, not X that by XXXXXXXXXX the amount of air you engine sucks in everyday and think about how much of that dust is going into your engine.

As a motorcycle mechanic I have seen hundreds of engines destroyed by using K&N filters. #1 they do throw off the jetting sometime lean other times they reduce the intake velocity and cause the engine to run too rich or just poorly overall. Even FI bike need to have the fuel systems re-mapped for a K&N.

for you K&N owners take a clean white rag and go wipe out the intake pipe to the manifold and then tell us its clean in there. I have shown dozens of owners this for YEARS and most people withh agree they SUCK. if the MFG could gain and extra MPG from a different air filter don't you think they would have installed it?

My stock 2005 Taco came with one.....

[Altitude]

Originally Posted by 07WYarisRS

for you K&N owners take a clean white rag and go wipe out the intake pipe to the manifold and then tell us its clean in there. I have shown dozens of owners this for YEARS and most people withh agree they SUCK.

Checking the intake on my Jeep with AEM CAI and K&N shows clean. I must have one of the K&N's that don't suck. The throttle body does have some gunk in it, but that's oil from the PCV and very, very little of it at that. All of this is with the occasionally very dusty driving conditions 4-wheeling up in the mountains.

Oh, and I clean it *maybe* once a year? Go figure.