Cummins Inc introduced the next-generation X Series engines. With the line-up expanded to three X engines, and ratings extending from 350 hp to 605 hp, this represents the broadest and most capable heavy-duty engine range that Cummins has ever made available to the North American truck market. The new engines demonstrated the power of great ideas with four defining attributes: Performance, Fuel Economy, Uptime and Integration. The X engine platform builds on the success of the current heavy-duty engines, taking on new names to reflect the evolution and introduction of the product platforms to meet Phase 1 greenhouse gas (GHG) and fuel-efficiency standards, to be fully implemented in 2017.