CAI vs K&N filter

Hello everybody,

Got a couple of questions..

What is the difference between a CIA and a K&N filter kit(57i)?
Here in Holland I can buy a filter kit for 350 Euro, which is about 320 Dollars....I think.
Is that the normal price for a kit?
And at my shop they said that this K&N filterkit is for the 1996-2002 only.
Is it possible to fit the kit into my 1995 primera?

thanks for answering my questions....Nissan and Infinity rules..:bandit:

Thomas