I tried a search for this but my search function wont cooperate.

Real quick question, is it safe to assume that the K&N drop in replacement filter for the Xterra is in deed a "better" filter than the stock? I have read about its ability to pull air through with more efficiency, but what about fine particles? Sand? Is it any worse in this department then stock?

Also, for those of you that have this filter, does it have an increase in noise at idle and or acceleration. I am hoping it doesn't, but would like to hear your opinions.

I pre apologize for my ignorance. I am just trying to decide if it is worth the money or not.

Thanks

CJ