Cummins, Inc. has announced submission of its third engine for certification under the Environmental Protection Agency's (EPA) stringent diesel emissions standards. The heavy-duty 11-liter ISM engine, which is now under submission to the EPA, has horsepower ratings ranging from 280 hp to 385 hp, and is positioned as a complement to the Cummins ISX for short-haul trucking, vocational, construction and bus customers. Cummins previously received certification for its ISX engine and later submitted its ISB 5.9 liter engine for certification. The EPA standards are set to take effect in October 2002, and require substantial reductions in diesel emission, to address environmental and health concerns.