Hmm. . My Sonic engine was made in Hungary. Along with a lot of other parts made elsewhere.
But I wouldn't buy a WRX. One of the main reasons we bought Sonic is because it had Eurpean pedigree, but is made in the U.S.
Just saying. . . .if a person likes and wants a Sonic. .. . buy it for what it is.
Not cobble it up and then come here when all the problems start after the "Mods" cause a person problems. Plenty of threads in the forum here and many others who just fade away after their Sonic is turned to junk.