This is the third time this has happened to me in the last month. While breaking through big, powdery snow drifts trying to make it home, the air filter plugged solid with snow. It was packed in there so tight that I had to pry the air filter out with a flathead screwdriver and then try and melt it off with a hair dryer at our farm shop before being able to drive the last couple miles home. This is with a stock air box. I remove the PSM and put the stock lower half of the box back in the winter to try and help avoid this, but it still happens. When it does, my EGT's skyrocket, so pay attention to your pyro while four wheeling in the snow. Here are some pics if they uploaded right.