The Engine Business manufactures and markets diesel and natural gas engines for on- and off-highway use around the world. Markets include heavy- and medium-duty trucks, buses, light-duty trucks and industrial uses in segments such as agriculture, construction and military equipment.

Cummins Power Systems is a global provider of power generation systems, components and services in standby power and distributed power generation. It provides a full range of services including turnkey and temporary power solutions. Cummins continues to produce high horsepower engines for ships, trains, generators and more, but that function moved from the Engine Business to the new Power Systems business.

Cummins Emission Solutions designs and builds exhaust aftertreatment solutions to reduce emissions for light-, medium-, heavy-duty and high horsepower engines.
Cummins Filtration designs and builds heavy-duty air, fuel, hydraulic and lube filtration, and chemical and exhaust system technology products.
Cummins Fuel Systems designs and manufactures fuel systems that maximize power and fuel economy while helping to reduce emissions.
Cummins Turbo Technologies designs and builds turbochargers to maximize performance and reduce emissions and fuel consumption.

Cummins Distribution Business sells and services the full range of Cummins products for over 20 application segments in more than 190 countries and territories around the world. In North America, this function is now called Cummins Sales and Service.