Heavy-duty Truck Engines
The X15 and X12 lineup is our best yet—giving you the power to perform, deliver, and save.
Choose what powers your engine
Innovation. Technology and Services
The new Cummins fuel-agnostic internal combustion powertrain solutions are an industry-first, helping fleets decarbonize with low-carbon fuels for fleet
Have it all with the 2024 X15 and X12 powertrain lineup.
With a focus of uptime, total cost of ownership and ease of operations, the Cummins heavy-duty platforms bring you the best 15-liter and 12-liter engines yet. Starting with the most reliable 15-liter ever produced, to offering EX ratings for enhanced driver performance, the X15 and X12 give you the confidence needed to improve your business without sacrificing anything.
—Devon Simper, Operations Manager for Savage Trucking
The Cummins X15 answers our fleet partners' needs for reliable and durable performance. Take it from Savage Trucking—the Cummins X15 engines enable their trucks to pull 129,000 pound loads at altitudes 9,000 feet above sea level across the American West.
Watch how Cummins pushes their fleet to maximize performance and efficiency.
X15N
Discover the industry’s first big bore natural gas engine that delivers solutions for a range of long-haul applications. With power ratings up to 500 hp and torque up to 1850 lb-ft, this engine will revolutionize transportation and your application needs.
Power under weight-sensitive applications
X12 (2024)
The X12 is designed to give weight-sensitive applications maximum payload. And at just 2,050 lbs., the X12 is at least 150 lbs. lighter than the lightest competitive 11L engine, yet it still delivers powerful performance from 350-500 HP and 1250-1700 lb-ft Torque. With the response and power of larger displacement engines, the X12 delivers the performance drivers desire while maximizing efficiency for every job.
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Transportation has evolved since the beginning of time. What does the future of transportation hold?
Going further, faster
Learn about tomorrow - today
The 2027 X15
Introducing the 2027 X15 engine. The next step in the Cummins HELM™ 15-liter platform. Offering up to 605 hp and 2,050 lb-ft torque, this engine demonstrates our continued commitment to the evolution of internal combustion technology.
X10
Introducing the new Cummins X10, a next generation engine that brings a state-of-the-art platform to medium-duty, heavy-duty, vocational, and transit bus applications, launching in North America in 2026. This engine is uniquely positioned to replace both the L9 and X12.
Listen on your favorite platforms: Apple Podcasts | Spotify | Amazon Music | YouTube Ingredients aren't just for cooking—they're for powertrains, too. Imagine the perfect blend of components coming together to create not just a vehicle, but a cleaner planet. In this episode, we talk about how each component, from turbochargers to emission solutions, plays a pivotal role in this narrative
What's the EPA27 Twin Module Aftertreatment? The EPA27 emissions rule requires significant reductions in nitrogen oxide (NOx) emissions for vehicles beginning with the 2027 engine model year. To meet these strict requirements, Cummins has developed the Twin Module aftertreatment system for the X10 heavy-duty and X15 engine. This system is designed to meet NOx emissions that are more than
What are the upcoming emission regulations in North America? The EPA27 emissions rule is a set of regulations established by the Environmental Protection Agency (EPA) to significantly lower nitrogen oxide (NOx) emissions from light-, medium- and heavy-duty vehicles. These regulations take effect with the 2027 engine models and require a reduction in NOx emissions by more than 75% compared to cu
Improving fuel economy in a heavy-duty diesel engine while lowering emissions is no small feat. For decades engineers have been aiming to achieve the combination knowing customer motivations to run cleaner for more miles per gallon. That’s what makes Cummins 2027 X15 such a stimulating topic among engineers, fleet owners and maintenance managers who know the interests all too well.&nbs
Zach F.’s journey at Cummins is more than just a job—it’s a family tradition. As a third-generation Cummins employee, his career is built on a foundation of legacy, leadership, and passion for innovation. From his early days as a Project Engineer to his current role as Site Logistics Operations Manager at the Charleston Turbo Plant, Zach’s dedication to both his team and the company’s mission is e
Vignesh V.’s path to Cummins is rooted in a lifelong curiosity about how things work, particularly in the world of automobiles. "I was always fascinated by airplanes and automobiles while growing up. I was always curious about how they worked," he recalls. "My interest in automobiles piqued during my graduate studies. I took part in an exciting inter-university competition. This experience solidif
Cummins Inc. (NYSE: CMI) is committed to the success of the data center industry and is proud to support the 7x24 exchange seventh anniversary of International Data Center Day (IDCD) on March 26th. IDCD was created to raise awareness about the dynamic data center industry and the multitude of career opportunities in the space. Cummins participation with IDCD empowers our employees, inspi
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