Heavy-duty Truck Engines
The X15 and X12 lineup is our best yet—giving you the power to perform, deliver, and save.
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.
Have it all with the X15 and X12 Euro VI 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-litre and 12-litre 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.
X15 Euro VI Performance Series
The power of versatility.
The X15 Performance Series gives you the ultimate flexibility suitable for both manual and automated transmissions, vocational, heavy-haul and line-haul applications.
With ratings up to 625 hp and 2050 lb-ft of torque available at 1000 rpm, the Performance Series ratings are optimised for application flexibility.
X15 Euro VI Efficiency Series
The power to save.
If you want the power to save on your bottom line, then meet the new Cummins X15 Efficiency Series – with the advantage of reaching to 900 RPM and still improving over Euro V.
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.
Power under weight-sensitive applications
X12 Euro VI
The best of all worlds.
Cummins is the undisputed global leader in high-performance diesel engines in on highway applications. For nearly two decades, the Cummins X Series platform has continually set new standards for power, productivity, low cost of operation and total value.
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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.
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