Cummins On-Highway Truck Engines

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 2021 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.

savage trucking customer testimonial video thumbnail

"The real world is the lab that matters"

—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.

Play Savage Trucking testimonial video

Power under weight-sensitive applications

2021 x12 engine product

Featured Heavy-duty engine

X12 (2021)

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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The future of energy transition

Transportation has evolved since the beginning of time. What does the future of transportation hold?

Watch three factors shaping the future

Going further, faster

Destination Zero

It’s our mission to power a more prosperous world.

We do this by helping customers succeed through innovative and dependable products that are good for our customers and the environment.

Learn more about Destination Zero

Cummins in action


Case Study

ISXe5 powers new trucks

The latest additions to the RTA fleet are 10 Western Star 6900s, all powered by Cummins ISXe5 engines rated at 600 hp with peak torque of 1850 lb ft.

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case study

Consistently reliable

Longtime partners, Emerald Carrying Company, maintain a fleet of Kenworth trucks equipped with Cummins X15e5 engines push to 1.35M kilometers, giving them the reliable power needed to keep moving.

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Case study

Powering partners for decades

Cummins engines contribute to decades of success for O'Neil Transport.

Read story
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