Need recommendation for "air-fliter"

What's wrong with the OEM filter? Volvo uses a very large filter that works very well right from the factory. There's nothing you can change it to that will get you any measurable improvement in performance, though some aftermarket filters will give you a measurable increase in particle ingestion and engine wear.

A filter gets clogged when doing its job. The oiled filters don't get clogged as easily because they let that crud into the engine instead.

I read a review where they tested all sorts of different air filter setups and found that in the vehicles they evaluated, the stock filters were superior at filtering, and produced a negligible pressure drop across them. The aftermarket filters all caused a second filter inserter further up the line to become substantially dirtier. I wish I still had the link.

This might be of interest: