MJB Engineering - Performance is our Specialty
This is beyond pricey but it does give a large filter area in a small package.
It has some drop. I could not contact the manufacturer because it is Saturday so I don't know the exact dimensions but it looks like they trimmed the outer ring off a 9" Xstream KN lid(s).
I have the two tops at 29 square inches each and a 2" tall oval filter at 59 square in inches for a total of 117 square inches. That is almost like mounting a 3.6" tall oval filter? That seems wrong but I think the math is good.
That is a .65 hp loss on my engines targets of 600hp, 6000 rpm, 482 cubic inches based on the second strike calculator. Not so worried about the hp loss (it appears I will have plenty) as the engines ability to breath fully.