[90yjwrangler]

what is the difference between these? does K&N give more power than stock, what other positive things comes with purchasing a K&N filter. btw, i got a 90 yj 4cyl. trying to get a little bit more power

[Pilky]

If your just gonna replace your stock filter with a K&N your probably not gonna feel a difference.

[cjb7804]

Basically the K&N allows more air to pass than a stock air filter. The only downfall with that is that the K&N doesn't filter out as small of micron dirt and pollen pieces as what the stock filter would do. The great thing about them is you wash them and re-oil them when they get dirty so you don't have to replace them like a stock filter all the time. As for true gains, I've got them in 2 of my vehicles (soon to be in 3 of them) and I love mine. I don't notice a big improvement in milage or power, but just the ability to clean and re-oil them is well worth it for me. The only time I wouldn't recoment them is if your in a terrible dusty enviroment, then your going to plug the K&N very fast and your washing it every month. Also in you get a K&N, it's good to keep a stock filter on hand for when you wash your K&N, you can thow in the stock filter to get by untill your other filter is ready. Every person will have a different story on wether to use a K&N or just to stay with a stock filter so it's really up to each person. Here's a little history on the start of K&N and why they were invented. My boss used to be an engineer for Stihl (the chainsaw company), and when Mt. St. Hellens blew in 82' ?? (I think that was the year) the ash in the air was clogging the chainsaws so bad that the loggers couldn't get any work done. So K&N came up with their washable filter and now we have them everywhere. Just though I'd share that with everyone!

[ErikJordan]

http://www.bobistheoilguy.com/airfilter/airtest1.htm

someone did the research for you

[prossett]

I think it depends on your driving environment - when I drive in sand dunes (there's no dust trail following cars) I'm satisfied the K&N is doing its job, but on dirt tracks (where there's a cloud of fine dust kicked up by each vehicle) the K&N gets clogged pretty fast as the dust wicks out the oil.

I have not yet found fine dust particles beyond the filter, on the intake tube or throttle body, so I'm happy with how it's going.

For the kind of driving I do (requiring fast acceleration up short inclines with little run-up) the cone filter I run does make a difference, measured in how far up a dune I can get.

[Robbins]

I live up two miles of dusty dirt road and I love my K&N. That means I drive through at least 4 miles of dust daily. I clean it probably every 3 months. less in the winter when there's less dust. I've never seen it compeletely clogged. With as fast as I'd go through paper filters on the dirt road, I'd say the K&N is a big money saver and a power booster. Definite power improvement. Noticable. I'd imagine especially in a 4 cyl (mine's a 6).

and Mt. St. Helens blew in 1980.

[ex-toyota]

i made a whole new intake system with pvs pipe, a k&n universal filter and some heat reflecting tape, not only did i feel a diference in pick up, but i got 3 more miles per gallon on my last fill up, im definitely happy with my new set up

[bluegill]

ex-toyota i made a whole new intake system with pvs pipe, a k&n universal filter and some heat reflecting tape, not only did i feel a diference in pick up, but i got 3 more miles per gallon on my last fill up, im definitely happy with my new set up

how did you go about makin this mod? heard its pretty cheap install! and usefull, if you can direct me to a website or directions of any kind that would be awsome. i know the concept but would like the measurements that go along with it! appreciate it!

[483Fitter]

i have the replacement k&n filter in mine, and i really didnt notice any power increase, i just like it for the fact its cleanable and i dont have to buy a new one, i can just clean it.