99% sure it will fit the scoop and hood fine. also 99% sure it will be way too short on your forester. this is due to the front cross member spacers that drop the engine slightly over an inch. i also read the zero sport splitters are pretty heavy.
what kind of tmic are you using? if it's the stock tmic i would just keep the forester splitter for now.
I had a similar GTSpec splitter that was basically the same thing for cheaper. It will work but you will have to drill out, IIRC, two holes on the top (maybe two on the bottom, too) but then it will work fine. Just be sure to put good thick weather stripping for cushion on the back side when you tighten it up so you don't get rattles.