I have the K&N 57 Series FIPK Cold Air Intake installed on my D. Does anyone here use (or know if they're even worth the money) the Filter Wraps they sell? From the information on their website, they seem like they'd save me some trouble in my off-road "encounters". They come in a few different colors too. Here's the info on them for those that don't know about them, Black, Blue, Red, and Yellow.