Join Date: Sep 2010
Location: Washington state
Car Year: 1999
Car Model: Forester S
Feedback Score: 0 reviews
Your car was fine without any additional weather-stripping. As someone who works for an OEM vehicle manufacturer I can promise you that Subaru did plenty of road spray testing in a wet cell. Based on your car not having a seal there, they did not feel it was necessary.
Besides, who cares if water and "salt" get into your engine bay? The front of the car is, literally, designed to allow air to flow into the front of the car, through the engine bay and escape out from under the car. When it rains, water follows the air along this path. When you drive in the rain, road spray follows air through this same path. This is completely normal and your car doesn't need a seal there (unless it was missed in production, or was somehow lost between the plant and your driveway.)
TL;DR - Much ado about nothing.