well I tested my new splash box on some puddles today. The filter stayed dry. but then again who drives through 9 inches of water all the time... The idea was to make something for Northern region drivers. We have to deal with snow and rain, more then most southern drivers do. The idea worked good. I made an enclosure around the filter on my CAI under the bumper on the driver side. then i vented the bumper into the enclosure. there was some water transfer into the box through the vent when I passed through a deep puddle (9inches of water). But none of it hit the filter. So this solved the Rain and snow problem. It also isolated the air issue. the only air getting into the motor is outside the car. they say "cold air is best.".