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.
Featured Heavy-duty engine
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
Featured Heavy-duty engine
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
Featured Heavy-duty engine
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.
Featured Heavy-duty engine
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.
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Cummins is a global leader in off-highway emissions solutions. With over 105 years of experience, 25 technical centers worldwide, Cummins is at the forefront of designing, integrating, manufacturing, and distributing exhaust aftertreatment systems. Our mission? To help customers meet today's stringent emissions standards while preparing for tomorrow's regulations. Off-highway applications: broa
The Planet and Me is a webinar series focused on helping you articulate your true value in a way that opens doors and drives growth. Each episode features expert conversations packed with actionable insights to sharpen your knowledge and position you for greater success and recognition within your organization. In a recent episode, I had the opportunity to converse with Karen Eber, CEO and Chie
For over 27 years, Loriann S. has been an integral part of Cummins, building a career rooted in leadership, technical expertise and mentorship. From her early days as a co-op student to her current role leading a Technical Sourcing team, Loriann’s journey is a testament to the opportunities and growth that Cummins offers. Her path to engineering began with a pivotal experience in high school. "
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