Mine is an 09 yz, and I'm running a 2 to 3" silicone 45° reducer with a 3"joiner to a boondocker filter which is basically a wire frame with a prefilter. Jetting is stock except one up on the pilot jet. Stock header with a fmf ti powercore slip on. The filter sits between the bottom of my seat and the forward part of the rear fender. I left the sides of the air box on the frame so i didn't have huge holes to look at. So far it works pretty well, but my vent lines get a snow ball on the end of them, and it starts running poorly. I haven't had issues with condensation, that I've noticed anyway... Buy every time i looked in there the filter was clean and dry. Even with 2 plus feet of pretty good snow(for Washington cascades). Going from the stock, un oiled filter with the skin the ts kit came with, to the pod, i have better throttle response, and it seems like there is more power as well.