These?
Legacy wagon in the next office has a set of these, I liked them, but they're heavy for 16" (compared to my 16" alloys).
97-2004 Legacy GT (mesh)
16x6.5 +55 offset
18.5 lbs
http://www.subaruforester.org/vbulle...orester-19106/
Your '07 Impreza should also be 16x6.5 +55. You should be good to go.