^ True, the tests were done in a controlled fashion and followed proper test procedures and standards.

And I also agree with the test results, which makes sense for any filter media that is coated with oil, that the K&N filter does provide more airflow at the BEGINNING but drastically tapers off and becomes more restrictive compared to a paper filter as dirt is exponentially accumulated. What this is telling us is that K&N filters may be ideal in motorsports where peak airflow is required only for the duration of the competition. However, I'd never recommend it for daily city use where the environmental air quality is considered extreme.

And those filter wraps were meant to be put on TEMPORARILY to repell water splashes or as an additional layer when driving in extremely dusty environments (think Dakar, rallycross, 4x4 off-roading without a snorkel, etc.) Again, it's probably NOT ideal for daily use.