Original: Subsequent builds , which are subclassed as 168\/1 and 168\/2 , were constructed at the same time as the Class 170 Turbostar and thus are part of the Turbostar family of trains .
Simplified: Subsequent builds , classified 168\/1 and 168\/2 , were given the newer style cab and a new design of wiring and thus are part of the Turbostar family of trains .