Plastic Cage Removed - Uni Filter need it?

[Sgblaster]

Just bought this thing.

For somereason the plastic cage has been cut off, does the Uni air filter need this?

Also the center bolt stripped so I'm hoping to just clamp on that Uni if possible

Edit; damn just found a pic of a used one on ebay; guess it needs that center bolt

 

[bummer981]

It needs the bolt and the cage or the filter will collapse

 

[Sgblaster]

It needs the bolt and the cage or the filter will collapse

Ok, I might mod to a cylinder style then, seems like PITA to get that cage assembly (not in USA)