Having scoured threads for CAI systems, the function of filters has paltry mention. I am not seeking increased power that likely I wouldn't notice anyway. An increase would be nice and appreciated, but its essence of diminishing particulate infiltration is paramount to me. Even so, might as well go for the (theoretical) efficiency increase of a boxed system over a short ram air setup. Also am eyeing the Borla cat-back for concurrent installation. HP & Raptor tuners will be researched separately. I don't seek a loud exhaust, and would like to avoid highway drone. Borla might not be the best choice. I don't know. Which CAI filters most effectively, and which exhaust rigging best mates to it? Which plays best on an '07 manual 4WD? The options are mind numbing. Reading about the all is eye burning. Recommendation appreciated.