Re: waht is this filter? (Kyokushin)
I thought other cars DO have them.
Inside the MAF are two VERY VERY VERY thin wires that incoming air flows over. These wires are used to measure incoming air mass. See the Bentley-published book "How to Understand, Service, and Modify Bosch Fuel Injection and Engine Management" by Charles O. Probst, which will give you good info how it works.
These wires are as thin if not thinner than a human hair. If any solid object enters, it can take out these wires and then boom, dead MAF.
I would NOT remove that screen.