You Really need to do a quick google before posting things like that... http://bit.ly/1chYVsD It's fuel injected BTW.. I don't have scientific citation, but this is in the realm of what I *thought* was common sense these days. I remember learning about it in the mid 1990's from a member of the VFR list. He just happened to be the facilities manager for a not-insubstantial mining operating in NM. They were looking for cost-cutting measures and paper air filters were one area they tested. Engines with oiled foam or gauze filters required rebuilds at 1/2~2/3rds the lifespan of those that used OEM paper filters. And those engine rebuilds were more expensive due to more damage done by particles, it was a major loss in money for the mine and they moved everything to OEM paper filters. I don't care if you don't believe it because it's your stuff, not mine. But *I* sure as hell won't run that crap on any street vehicle, and my credentials include 14 years as a factory trained/certified MC mech and certified dyno operator (those filters Don't increase power in any measurable way ~ I've wasted more hours than you could imagine testing this for customers).