I took the dealers advice on how great UNI-FILTERS are and put one on my '08 800 Outlander. I just did a valve adjustment and decided I would service the air filter while I was at it. The filter was put on 51 hours ago and has not seen any dusty conditions except for one recent 26 mile ride. The filter did not look dirty at all, still bright red, not even hardly a sign of light dirt residue on it anywhere. As I always due when I service air cleaners, I looked down the throttle body to make sure it is clean and to my suprise, it was filthy. I then cranked the throtle wide open and looked down into the intake manifold and saw dirt residue and build-up. I then removed the intake manifold to see just how much dirt was really in it. It appears as though I may as well have run with no air filter at all as much dirt as there is in the intake. Doesn't appear that UNI-FILTERS stop dirt at all. I then went and pulled the K&N off my wifes 400 Outlander Since it has 40 hours of dusty conditions on it since last serviced, and it was clean as a whistle throughout the intake. Now according to Can-Am, K&N's are a no-no because they let too much dirt by. Well what the hell are their recomended UNI's doing then. How much life just got taken out of this engine due to an inferior product recommended by the factory. I'm so pissed off right now over this whole deal I could just explode. I put the intake manifold in a ziplock bag with all the evidence still in it. I almost pitty the dealer when I show up tomorrow with the manifold and the filter to stick up his &#@.