Cummins X10
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The Cummins X10 is a medium to heavy-duty internal combustion engine. Launching in 2026, it will be compliant with U.S. EPA’s 2027 regulations a full year early. The diesel version will replace the Cummins X12 and Cummins L9. It will serve vocational, transit, pickup and delivery and regional haul customers.[1]
The X10 is built on Cummins’ fuel agnostic platform, allowing for a series of engine versions that burn different fuels and are derived from a common base engine. Below the head gasket, each engine will largely have similar components. Above the head gasket, each engine will have different components for different fuel types.[1]