Re: Cold Air Intake for 2011 Laredo 3.6L
"Retaining" more dust is good. Some claim they let more in, and some have UOAs to prove it. Others have UOAs to prove K&N filter just fine. It all depends on the application. In general, I pick others over K&N due to the maintenance. Dry filters are so much easier to maintain vs. oiled gauze. However, I'm not afraid to run K&N based on their "filtering" ability.
A few years ago I cleaned my dad's K&N. His filter box was the filthiest I have seen. There were bugs, cattails, you-name-it in there. The filter had 45K on it, and had been driven on a lot of gravel roads. I took a white paper towel to the inside of his intake tract -- after the filter. It came back spot clean. I've run K&N since '95. However, if a dry performance alternative is available, I will chose it first (for the reason mentioned above).
2014 Durango Limited AWD in Granite: Premium Package, 2nd Row Captain Chairs, 2nd row Console.