Plastic end on air filter

Your picture didn’t go through, you may need to shrink it to something under 1000 kb

I believe that what you are referring to I have no name for but what I think it does is to cause the intake air to swirl and the dust be separated out then sent out the (lack of a better name) pooter  valve which is that rubber  valve on the lowest part of the air cleaner. The vacuum of the engine pulses that valve to work and shed the dirt. I THINK

That’s a design that was made by Donaldson many yeas ago. The same design is also used on air filter pre-cleaners. They were originally called “Donaclone” filters. I have one on my skid steer and dozer, and they are both equipped with an automatic dust ejector “pooter”, which extends the filter life.

The incoming air creates a toroidal (centrifugal force) effect, throwing the heavy dust particles against the housing.

https://www.donaldson.com/en-us/engine/filters/products/air-intake.html