It’s an intake. It does what it says. I think the filter rubs a bit on the frame under the heat shield. Can’t really do anything about that.
Looks great installed. The installation was simple and easy, and I'm not a mechanic. I only have the standard Impreza with a non-turbo 2.0L, but the new growl it has when I get on it is pleasure. Pickup seems a bit better and gas milage is up slightly.