It's just a wrx engine .

and as for the money yes there is a limit . but if i only have to spend it once i'm happy to spend around 10k for a rebuild .expecially if im doing most the work .

im pritty sure 10k will be enough for
Pistons,head work , cams, and probably a few more things . But the 10k is mainly just for engine work not turbo and other bolt on stuff.