Sorry U nay-sayers, but I built a home made Ram-Air about 4 years
ago that really helped my 89 GT! Helped from a dead stop too!
But I had only a K&N in the stock airbox before, and added the
Ram-Air to that. Never had a problem with moisture, the rain drops are
heavy enough to just hit the sides of the tubing and basically stop.
What little makes it to the filter box would drip down into the bottom
and I believe there are a couple of weep holes in the bottom that it would run out.
Other than that it is OK to get moist air into the engine, ever hear of
water injection? That puts in more water than you would ever get in a
huge rainstorm that you would be driving in. My stangs have all been
"squirrely" in wet weather
sorry for the reference Ken