The Kawasaki Heavy Industries & CSR Qingdao Sifang C151A is the fourth generation electric multiple unit rolling stock in operation on the North South and East West lines of Singapore's Mass Rapid Transit (MRT) system, manufactured by Kawasaki Heavy Industries (KHI) and CRRC Qingdao Sifang under Contract 151A. Their introduction to the network has increased the capacity of both lines by 15%.