[pat in Santa Cruz]

I prefer a K&N filter, as they restrict less than paper and catch dust pretty well. There are 2 that fit the airmaze, one is the same size as the original screen, and the other is longer, requiring that you extend the center with all thread. I can't recall the part numbers, but if you consult a K&N catalog you can find them by dimension. Just measure your airmaze filter insert. Most auto stores carry the catalog and can order the element for you. I prefer the largest one I can get to fit the airmaze.