I just purchased an 05 Honda Rubicon and wanted to know if a K&N air filter boosts the performance any. Any pros/cons of using K&N?

 

IMO dont use a k&n. they really do let in more junk than a foam filter. when i bought my foreman it came with a k&n, i switched to a UNI and have seen 0 diffirence in preformance. with the UNI its piece of mind that im getting the best filtration, and not letting larger particles of dirt threw like k&n dose.

its proven that k&n has more airflow, because it dosnt filter as fine as foam.

 

I also would not use a gause type filter on something that lives in the dust and grit...

I think the airbox restricts flow more than the stock foam filter does, anyway.

 

i posted a question a few weeks ago akin if the k& n is worth is or not & most agreed on the uni , c if u can pull up my post ( k& n is it worth it)

 

Thanks guys

 

Ideally: foam for dirt and k&n for sand.

 

Here is an interesting article where they compared various air filters. Granted, it is for a duramax truck, but it is the only independent test of assorted air fliters using ISO testing equipment that I have come across.

In a nutshell, all the aftermarket filters flowed better than stock when clean, but after a little bit of dust was introduced the stock filter flowed better. The stock filter also let the least dirt pass through.

ISO 5011 Air Filter Comparison

 

Thanks Jeffin, that was very informative. I think alot of people are duped into believing an air filter will give them more power or better filtration when they really don't. I use them so I can clean them often and they will still work if they get wet.

 

yea i got a uni because its a good filter and easy to clean......but i read somewhere that the stock was just as good at flowing air.

 

It sure doesn't hurt to have two filters for each machine, so you can always have a clean one on hand and ready to go, w/o having to wait for solvent to dry...