Cummins Westport Inc.

Cummins Westport Inc. designs, engineers, and markets 6 to 12 litre spark-ignited automotive natural gas engines for commercial transportation applications such as truck and buses. Our dedicated 100% natural gas engines are manufactured by Cummins and available as a factory-direct option from leading truck and bus manufacturers. 

Cummins Westport natural gas engines are based on the proven line of Cummins diesel engines, and share many of the same components. They are built in Cummins factories in Rocky Mount, North Carolina and Jamestown, New York.

More than 80,000 Cummins Westport engines are in service worldwide. Designed to meet the most stringent emissions regulations, they provide efficient and reliable service.

Cummins Westport natural gas engines are certified with catalyst. They meet or exceed the toughest emissions standards including the U.S. Environmental Protection Agency (EPA), California Air Resources Board (CARB), and EURO emissions standards.