I'm guessing that, with the redesigned front end/sheetmetal, this probably changes things insofar as fitment, however....
On the Subaru end of things, the one most highly regarded is Cobb Tuning's CAI. It's very expensive, though.
www.cobbtuning.com
Injen is popular, as is the K&N one, which you can buy in lots of places, but here's one:
www.subaruwrxparts.com
There's also GanzFlow and PDM-Racing, which use a similar design, with a different shape. PDM uses' Ganz's ver.1 design; Ganz then changed the shape to their current, or ver.2 CAI. The PDM is also about half the cost, at $50 USDM brand new (they're in Canada).
www.pdm-racing.com I have the PDM in my car.
Can't say anything about fitment, but those are the ones I know of. There's also the Gravelsports unit, which looks more like a TMIC, mounting with a panel facing up towards the hood scoop. Search
www.nasioc.com or
www.RS25.com for info on those.
Group buys happen occasionally.
=S2=