Subaru does not build many cars like the Scion FR-S with Subaru FA engine, made in small numbers.
The engineering
Under the skin sits Subaru FA engine. These are manufacturer figures carried by Wikipedia and Wikidata, not road-test measurements.
Where it sits
Where it sits in Subaru's history is not in doubt: it was built at Gunma Prefecture. Its Subaru stablemates include the Subaru Chiffon and the Subaru Lucra.