As well as providing easier water crossings and cleaner, cooler air, both the major brands of 4×4 snorkel kit available offer what is called an ‘air ram’. The air ram is the component that sits on top of the snorkel and it does two things.
First, because it is facing in the direction of travel, the snorkel is forced through the air and creates a ram effect which can improve engine performance.
Secondly, the air ram separates any water or moisture that enters the snorkel before it gets to the engine. Because water is heavier than air, the 90 bend of the air ram causes the heavier water to move to the outside surface where it can drain out.
When you need to buy car snorkel kit, 4wdoverlander are over 36models available which are made of polyethylene and pass UV8 level.