obviously you weren't paying attention to the ending of the movie. Racer X IS Rex Racer! only he is a spy for CBI trying to make racing "good" again. thing is, he had plastic surgery to cover up the fact that he is indeed Rex Racer. i mean, if ANYONE found out who he REALLY was, all hell would break loose. he's got to keep the fact that he is who he is hidden to get his job done and help his family continue their dream of having their OWN racing company that isn't in it for the money, the sponsership or the "glory." they just LOVE to race! :)