 The Kawasaki Heavy Industries C151 is a type of train that is one of the four current types of electric multiple unit on the North South and East West Lines of Singapore 's Mass Rapid Transit ( MRT ) system . These are the oldest trains built for the system ; they were introduced in 1987 and are still in operation . Sixty @-@ six trainsets consisting of six cars each and a single money trainset consisting of four cars were purchased . These trains are operated by SMRT Trains . 
