You can have it all with the 2021 X12 and 2021 X15 powertrain lineup from Cummins. 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.
X12
Designed for the medium-bore market, the X12 brings the next level of efficiency and productivity to customers traditionally operating 11-13 liter powertrains. When combined with the Endurant HD transmission, customers will benefit from the lightest integrated powertrain option on the market and will see class-leading maintenance intervals.
X15 Efficiency Series
Optimized for linehaul and regional haul applications, the X15 Efficiency Series with EX Ratings sets the standards when it comes to over-the-road powertrain efficiency.
X15 Productivity Series
If you need access to continuous power for the most demanding applications, the X15 Productivity Series provides up to 605 horsepower when using Performance Series hardware, and up to 500 horsepower when using the Efficiency Series hardware. The Productivity series is ideal for use in multi-purpose, vocational, or heavy-haul applications.
X15 Performance Series
The X15 Performance Series has been optimized for premium linehaul and/or heavy-haul customers that demand more than 500 horsepower. Starting at 525 horsepower and offering up to 565 horsepower with 2050 lb-ft torque the Performance Series will help you one of the first vehicles up the hill.
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X12 |
X15 Efficiency Series |
X15 Productivity Series |
X15 Performance Series |
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Horsepower (Kw) |
350 – 500 |
400-500 |
430-500 (321-373) with Efficiency Hardware 565-605 (421) with Performance Hardware |
525-565 |
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Peak Torque |
1350-1700 lb-ft |
1650-1850 lb-ft |
1650-2050 lb-ft |
1850-2050 lb-ft |
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Peak Torque RPM |
900/1000 |
950 |
950 with Efficiency Hardware 1000 with Performance Hardware |
1000 |
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Governed Speed RPM |
1800/2000 |
1700 |
2000 |
1900 |
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Ideal Applications |
Linehaul / Regional Haul / Weight Sensitive / Vocational |
Linehaul / Regional Haul |
Multi-purpose, Vocational, Heavy-haul, Premium Linehaul |
Premium Linehaul / Heavy Haul / Vocational |
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Engine Weight (dry) |
2050 lbs |
2961 lbs |
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