pagkakaalam ko , that needs to have

1. high ground clearance
2. waterproof engine bay(um, i guess for really extreme cases na to)
3. the air intake mounted up high
4. exhaust mounted up high
5. battery and connections waterproofed, or mounted up high

just wondering that while some do have snorkels or have their air intake mounted high, few bother to do the same with the exhaust. ok lang ba na lublob sa baha ang tambutso, so long as walang papasok na tubig sa intake? di ba pwedeng pasukan din ng tubig at the other end(exhaust)?