I thought I had read on here somewhere that with the Uni filter you could separate the two layer's of foam for cleaning and oiling purposes? Well I got my 2 Uni's in the mail yesterday and noticed that is not the case? Mine came looking just like the stock filter only red? I did notice the cage had bigger openings. So it should flow better, but I was hoping to be able to take the foam apart to help in servicing the filter. Did I order the wrong ones or do they not come like that? I'm confused... Suggestions?