I've noticed that everyone I've seen on this forum that has upgraded their air filter is using a K&N. I'm curious if anyone has tried an Amsoil air filter. Amsoil filters are like the K&N in that they are washable and re-usable, and are oiled. They are different in that they are a little thicker and use a sponge media rather than the cotton mesh of the K&N. They provide close to the same performance, within 2% from the dynos I did on my Tacoma, and cost 1/2 as much as a K&N.
I've checked my parts source and there is one available for V6 Xterras for about $22.00. I can get more info if anyone is interested.
Also, are the air boxes on 2001 and 2002 models the same?