Cummins revealed its expanded medium-duty vocational lineup and unveiled how its Twin Module Aftertreatment system will meet EPA 2027 requirements during a press event Wednesday at Work Truck Week 2026 in Indianapolis.
José Samperio, vice president and general manager of Cummins’ On-Highway Business, kicked off the event by touting the company’s new Cummins X10.
Samperio says the mid-bore diesel workhorse was designed to support multiple vocational segments. Built on the proven legacies of the L9 and X12, offering up to 4% and 2% improved fuel economy respectively, its 10 liter platform reflects Cummins’ commitment to advancing technology that helps fleets reduce operating costs while maintaining the power and performance needed for the toughest jobs.
“Customers expect dependable performance from their Cummins engines, no matter the environment,” says Samperio. “With the X10, we have heavy duty strength in a medium duty package to offer customers the versatility and staying power they need for every job.”
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The X10 also will meet upcoming EPA regulations with the Cummins Twin Module Aftertreatment system.
Built on proven architecture and technology, the system features separate DPF and SCR assemblies enabling flexible chassis integration while maintaining serviceability requirements, says Simon Guest, executive director of marketing. Complete with 48-volt electric heating to delivers on-demand thermal management when and where required, Guest says the X10 with the Twin Module Aftertreatment system will provide consistent, reliable and durable performance in all work truck settings.
Cummins also used Wednesday’s event to highlight its B-Series engines, the B7.2 and B6.7 Octane, and its 6.7L Turbo Diesel.
Cummins says the B Series remains an industry mainstay for vocational and work truck applications, delivering dependable performance, serviceability and fuel efficiency. The B Series provides customers with familiar installation, broad application coverage and a long-standing record of uptime and reliability.
The B7.2 was unveiled at Work Truck Week in 2025, and the B6.7 Octane extends the lineup with a gasoline option for customers seeking an alternative fuel solution in a familiar footprint. As the first purpose-built, commercial-grade gasoline engine for medium-duty work truck and rental markets, Cummins B6.7 Octane combines diesel-like durability with gasoline simplicity to support dependable performance across operations.
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Finally, the Cummins 6.7L Turbo Diesel is the benchmark for commercial use pickups. Available in Ram 2500/3500 pickups and Ram 3500/4500/5500 chassis cabs, it delivers outstanding power, smoother and quieter performance, easier serviceability and significantly improved towing and acceleration compared to the previous generation.
