Unlike standard cowls that end right at the cowl this one extends into the cowl. I have been in the rain a few times and have not gotten anything inside. When car is moving rain just goes over the windshield. That I can recall I don't think I've been stuck in heavy rain without being on the move. I want to eventually put some kind of mesh like cowl panel has so that only thing you see is gauges as I have room for two more.