Couldn't agree with you more on the K&N. I think they are overated and they do let more contamination into the engine. It would have to in order to enhance performance e.g. more air flow. If I was that concerned about performance I would have purchased something with a lot more horsepower (Ha). I just love the Santa Fe because it looks great and its a blast to drive. It also costs less, has a better warranty yada yada yada.