Keep looking - K&N doesn't seem to be that good at actually filtering. Courtesy of my quarantined status, I kept on with the links, and in a later vid there is a nice comparo of filtration effectiveness. K&N gets its ass handed to it in terms of actual filtration. I DK how much these particle levels matter, but the first vid does a good job of showing that these minor diffs in air flow are negligible for performance. I'd love to see a similar (or perhaps better-designed) comparison for the other high perf filters. The fixation upon filter flow comes from the naturally aspirated world, especially with carbs; our cars have a nice big turbo that is being told how much air to push - I suspect it is automatically compensating for any restrictions the same as for higher elevations, and just pushing a little harder.