A friend of mine repladed his oil cap with a filter. Prose and cons?

I've looked thru MANY threads and can not find a sketch on how to use the stock intercooler and delete the airbox and go with a cone filter. I like midnight tokers setup but can't figure it out via pictures.

on my daytona should the cone just fit onto the lower induction hose with a hose clamp? cause im getting a k&n cone filter and i was just wondering if i needed a special adaptor or anything?