Don't even worry about it. I live in western/upstate NY. I've had my resonator off for a while. Almost 3 years now. Snowstorms, heavy rain, puddles, no issues. I was really paranoid the first couple of big rains we had but I popped the hood and felt way down in the airbox to the lower tubing. I never felt a drop in there. The high filter location also means that if water splashes up in that area, there isn't a filter down low to start attracting and holding onto water.