supposedly does a good job depending on where you put it. a twin one would be no good as there isnt enough room in the engine bay obviously but a few people have a single that goes down to the front bar vent or something.
To be honest, with a naturally aspirated engine, you want as little restriction in the intake as possible. It has to suck without help & sucking through all that piping & twin filters is only going to make it harder for it to breathe. Setups like that have been proven to work on cars with forced induction thou.
Eg. If you have the filter closer to the throttle body, low end power and quick response is high but top end is not as good. Obviously it needs to be shielded for this to work.
If you want top end power, try the set-up i have. Has slightly lower response (due to the long pipe to travel to the throttle body) but huge power because of the air pick up and also it is an area that has the coldest air flowing.