Installed the finally released K&N air filter in my CX3 this past week. I've always had good success with these filters in previous cars. Typically notice better, crisper throttle response, and modest increase in mileage. So far, I'm noticing the same gains. Mid-range seems a bit stronger as well. I've picked up 2/10 of a mile per gallon so far. I also like the fact that they are washable/re-usable.