Am in a bit of a quandary as to which air filter I need. I have the lozenze shape as shown in pics attached. Most seem to have a split in half version with top bolts or an end cap with clips. Mine has neither it has a single butterfly nut on the end cap. Only other one like it I have seen is on a youtube video.
https://www.youtube.com/watch?v=KhQLQZLijVM&t=27s at 26 seconds shows it plainly.
I am not sure how I am supposed to fit a filter into mine as there are a couple of support brackets inside shown by the pics with red arrows. The distance from the end cap to where any filter could not go further is exactly 280mm which is the dimension of the one for supposedly the top bolt fitting, I think.


