the steering knuckle hitting the dump pipe problem is even worse on foresters, even a system that will clear the knuckle on a gc8 of gda/b may hit the knuckle on a foz, simple fix with a blowtorch & hammer though

stay away from divorced w/g dumps, no way in hell fitting in a foz without going rotated mount

burkes is probably your safest bet for direct bolt on as this was on his foz with no issues