Hey,

I have the JWT Pop charger in my 98 maxima. Its about due time for me to replace the filter on it. Have gone through numerous cleanign stages and figure time to just buy a new filter.

The question is, does anyone know which K&N filter (part number) I should buy. thanks.

 

What is the mileage on your car? K&N recommends that their filters be cleaned every 50K miles. They say that a little dirt helps the filter to work better. Don't ask me how that works.

 

I just replaced mine with RF-1013. It's a little longer than the original though, so I'd recommend getting something like RF-1043 or RC-2960.
You can see filter dimensions here: http://www.knfilters.com/universal/univrndtap.htm

I ordered mine from:
http://www.ajusa.com/cgi-bin/knfilters/start?ajusa
Best price, free shipping, and the cleaning kit was only $9