On many race cars (couldn't tell in your pic, Bill), each air intake hose connects to a NACA duct attached to the rear quarter window "glass" (usually lexan). Putting ducts in the bodywork is pretty radical for a street car and usually against race regs. (depending on the race org.).
Water ingestion is always an issue, moreso if the air intake faces toward the heavens or is low next to puddles and other water sources.
Sherwood Lee
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