Mitsubishi Diesel Engine S4L2 demonstrates a superior affinity with construction and production machines. It has the best level of quietness in its class, achieved by the optimal design of the fuel system and the thorough structural analysis of each component. The SL series was designed after undergoing rigorous endurance tests with regard to the effectiveness of the middle low gear torque and by concentrating on machines for construction and production. Cleaner emission. A clean exhaust system that is beneficial to people and the environment has always been a top priority for the Mitsubishi engineers. Lower emissions are achieved with improvements in the fuel system for a total and trouble-free combustion. The combination of experience and theory. Construction and production machine engines require an effective middle low gear torque and a high endurance level. Making use of their experience and theories, our technicians have repeatedly tested on aspects.