I don't. In a nut shell you need to take the plenum off, seal around the headlight, where the hood meets the dash, and any other spot you can see gaps. If you don't these all lead right into your motor and can do bad things. IE suck in road dirt, in deep dry snow it will suck it in etc etc.
also, get some flowrite material..and silicon a peice right to the lip of the slp airhorn..will eliminate any moisture in the airbox, I would also install slp's powder valves in the airbox(flowrite siliconed over them and silicone the airbox seam so it doesnt suck belt dust into the throttle bodies)...and silicon shut the water drainhole in the plenium floor and redrill a new hole over toward the edge(drips water right into the powervalve hole and rust the spring)that will get the intake sealed and breathing even when buried in powder snow......