I did make the switch however to the new Amsoil Ea air filter on my new Subi.....wanted to give it a try. Much cheaper than the K & N (about half price & that does not include the 'cleaning kit' for the K & N filter as there is no cleaning kit needed for the new Amsoil filter), easier to clean, better filtration & lasts 100,000 miles. I've noticed a pretty big increase in my fuel economy after swapping out the OE paper filter.
If anyone is interested, here is some more info.....
K&n Air Filter Ls400
in Lexus Modifications Forums
Posted
Thanks for the suggestion. I'm ordering it today.:)