I bought the hitch on line. It's a standard 2" bolt on receiver hitch. About $175 if i recall. Installed it myself. I've done this on all my subarus. i'm on my 6th one, 2013. Can't say enough good things about them. Subaru all wheel drive is REAL all wheel drive; not like a 4(2) wheel drive truck or american all wheel drive. All 4 wheels will go.
Decent gas mileage and they can pull.