Had to get away from the in fender set up. A puddle almost made me stall out plus I'm lowered.
The fender air filter is suppose to get cooler air into the motor, thus letter the motor make more power. That's fine for a sun shiny day driver but around here we get rain, sometimes a lot of rain at one time. My ProCharger air filter on the passenger side under the hood at radiator level. I was taking my normal route home on a county road and went to a puddle so deep that it leaked in on the carpet under the doors. Water splashed over the the top of the windshield. It also went into the engine compartment where the supercharger sucked it in. Water went through the supercharger, through the intercooler and fouled the MAF. The would barely run until the MAF was cleaned. If the MAF had been in the fender well I am absolutely sure that I would have hydrolocked the motor.
A member of this forum did exactly that. Water does not compress. If it gets into the combustion chamber the result is bent and broken connecting rods. Because of that I do not recommend fender well cold air intakes in areas that get a lot of rain.