I just tested a K&N on one of My Pony Motors, We run in a extremely dusty environment the motor runs a Safety Filter and the one thing I found out is the K&N lets a lot more Dust in then the paper element and I mean way more. Now I upped the amount of oil on the filter and it cut back the amount going though it, but the paper still filtered better. The safety filter is white so it shows Me just what is going through the main filter, air flow is much better on the K&N, but Be Wary of Extra DUST in real dusty environments just My take on K&N from our use in heavy equipment. Now we do rev our motors for power to run the equipment so maybe it just from drawing more air volume in, for the street I'm sure it would work great.