Have an 08 Legacy and a bit of a challenge deciding where I could mount a 2 head blinder.
Red dots - There is a black "lip" here for lack of a better word, which protrudes down and forward. There appears to be good flat surface behind this that shims or some type of blocks could take care of.
Yellow dots - corners at bottom of grill are rounded, but area is relatively flat
Green & Blue - Challenging in that the mounting surfaces are angled, and there isn't much to mount to in there. I also didn't think I would get good coverage on the fogs with the heads being so high.