Best bet is to go with a good k&n like the filter on the right and clean and re oil weekly. Ten dollar filters are worth just that, your engine builder and pocket book will thank you.
Try the filter on the left - you will not be sorry. (on the flowbench, on the dyno, and on the track)
Does it filter as well as a genuine K&N? Obviously not.
If K&N offered a filter with that flange shape, I'd run them and offer them to our customers.
The filter on the left is what just about every animal engine customer orders from us.