Class 170/4 Turbostar DMU
100 mile/h 2 & 3 car units with Cummins/Voith transmission
Built by Bombardier at Derby Litchurch Lane Works between 1999 and 2005
170401-170434 and 170450-170479
Operators - currently Scotrail and Northern except 170416 and 170417 which are operated by East Midlands Railway