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Cummins Inc. (NYSE: CMI) has unveiled its new 2025 6.7-liter Turbo Diesel Pickup engine system for Ram Heavy Duty, extending their partnership with Stellantis through 2030. The advanced engine system will be featured in the 2025 Ram 2500, 3500 Heavy Duty Pickups and Ram 3500, 4500, and 5500 Chassis Cab trucks.

The new engine delivers enhanced performance with High-Output ratings of 430 horsepower and 1,075 lb.-ft. of torque for Pickups, and 360 horsepower and 800 lb.-ft. of torque for Chassis Cab. Key improvements include a brand-new 8-speed transmission, improved acceleration and towing capabilities, reduced noise and vibration, advanced emissions air handling, and enhanced serviceability features including top-side maintenance access and in-cab software updates.

The engine, manufactured in Columbus, Indiana, represents a significant evolution from the first-generation 5.9-liter, 160-horsepower engine to today's more powerful 6.7-liter version.

Positive

• Extended partnership with Stellantis through 2030, securing long-term business stability
• Significant performance improvements with 430 horsepower and 1,075 lb.-ft. torque output
• Enhanced serviceability features reducing maintenance time and costs
• Integration with new 8-speed transmission improving overall vehicle performance

Negative

• None.

Extending 35-Year Partnership through 2030

COLUMBUS, Ind.--(BUSINESS WIRE)-- Today, alongside their partners at Ram, Cummins Inc. (NYSE: CMI) unveiled the new 2025 6.7-liter Turbo Diesel Pickup engine system for Ram Heavy Duty, their most advanced diesel pickup engine yet. As part of this, Cummins and Stellantis have extended their partnership to supply Ram Brand through 2030, paving the way for continued innovation among the most iconic Pickup brands in the business.

New 2025 6.7L Cummins Turbo Diesel for Ram Heavy Duty Pickups (Photo: Business Wire)

Cummins’ 6.7-liter Turbo Diesel advanced engine system and powertrain will be offered in the recently announced 2025 Ram 2500, 3500 Heavy Duty Pickups and Ram 3500, 4500 and 5500 Chassis Cab trucks.

“We’ve improved the power, efficiency, serviceability and driveability of our latest 6.7L Turbo Diesel engine, making the 2025 Ram Heavy Duty lineup the most desirable yet,” said Jane Beaman, Vice President – Global On-Highway and Pickup at Cummins.

The next generation of the Cummins 6.7L Turbo Diesel engine system was designed with steadfast commitment to reliability and durability, living up to the 106-year-old brand customers expect, while setting new benchmarks for performance and efficiency.

Cummins’ latest offering delivers enhanced performance alongside High-Output ratings of 430 horsepower and 1,075 lb.-ft. of torque for Pickups, and 360 horsepower and 800 lb.-ft. of torque for Chassis Cab. In close collaboration with Ram and their powertrain providers, the 2025 Cummins 6.7L Turbo Diesel engine is optimized with a brand-new 8-speed transmission, providing the right combinations of power, responsiveness and driveability.

“Whether you are towing heavy loads for work or pulling your weekend camper, Cummins 6.7 Turbo Diesel is ready for any project. Our engineers have integrated critical, yet versatile, high-performance engine technologies that customers expect at lower emissions,” said Jennifer Rager, General Manager – Pickup Business. “We’re thrilled to continue our partnership with Ram Brand and introduce the best diesel Pickup engine in the industry.”

All 2025 Ram Heavy Duty truck models powered by Cummins received noticeable gains in acceleration and power, driving home stronger overall truck performance and towing capability.

The Ram 2500 gained improvements in towing speeds and responsiveness, with faster 0-60 mph and quarter-mile times, especially when towing heavy loads. These enhancements promise drivers smoother transient responses and greater confidence under towing conditions. Noise, vibration and harshness were also improved using helical valve train synchronizing gears which enable a quieter ride.

The latest power offering for Pickups and Chassis Cab from Cummins includes advanced emissions air handling that also introduces a new airflow management design. This accompanies a new high-pressure fuel delivery system that offers top feed dry service injectors and a new fuel pump. Cummins’ newest variable-geometry turbocharger for the new 6.7-liter delivers intelligent condition-based power output that is now faster and more efficient.

Cummins has also introduced new features that make it easier to service the engine system and get back on the road. Software updates can now be executed from the comfort and convenience of inside the truck. In addition, the oil filter and dual fuel filter are now thoughtfully positioned to enable serviceability from the top side of the engine, improving the ease of maintenance—resulting in faster and less complex servicing for the 2025 Cummins 6.7-liter Turbo Diesel.

Additionally, the Cummins 6.7 Turbo Diesel Pickup and Chassis Cab engine systems offer significantly improved cold-start management with the integration of advanced glow plug technology. By reducing the wait to start time, this enhancement ensures reliable vehicle operation even in the harshest and most extreme weather conditions.

Together since 1989, Cummins and Ram set the standard for innovation, power and durability; and the two are marking more than 35 years of partnership that will continue beyond the decade. Built in Columbus, Indiana, the 6.7 Turbo Diesel has evolved from the first generation 5.9-liter, 160-horsepower to today’s 6.7-liter engine up to 430 horsepower.

For more information about the new 2025 Cummins 6.7 Turbo Diesel engine, visit www.cummins.tech/pickup.

View the full media kit here: Cummins 2025 6.7L Turbo Diesel Pickup Platform Media Kit | Brandfolder.

About Cummins Inc.

Cummins Inc., a global power solutions leader, comprises five business segments – Components, Engine, Distribution, Power Systems and Accelera by Cummins – supported by our global manufacturing and extensive service and support network, skilled workforce and vast technological expertise. Cummins is committed to its Destination Zero strategy, which is grounded in the company’s commitment to sustainability and helping its customers successfully navigate the energy transition with its broad portfolio of products. The products range from advanced diesel, natural gas, electric and hybrid powertrains and powertrain-related components including filtration, aftertreatment, turbochargers, fuel systems, valvetrain technologies, controls systems, air handling systems, automated transmissions, axles, drivelines, brakes, suspension systems, electric power generation systems, batteries, electrified power systems, hydrogen production technologies and fuel cell products. Headquartered in Columbus, Indiana (U.S.), since its founding in 1919, Cummins employs approximately 75,500 people committed to powering a more prosperous world through three global corporate responsibility priorities critical to healthy communities: education, environment and equality of opportunity. Cummins serves its customers online, through a network of company-owned and independent distributor locations, and through thousands of dealer locations worldwide and earned about $735 million on sales of $34.1 billion in 2023.

View source version on businesswire.com: https://www.businesswire.com/news/home/20250107034963/en/

Melinda Koski, External Communications Director

317-476-3293

melinda.koski@cummins.com

Drew Blair, Manager On-Highway Communications

812.900.3223

drew.blair@cummins.com

Source: Cummins Inc.

FAQ

What are the power specifications of the new 2025 Cummins 6.7L Turbo Diesel engine?

The new engine delivers High-Output ratings of 430 horsepower and 1,075 lb.-ft. of torque for Pickups, and 360 horsepower and 800 lb.-ft. of torque for Chassis Cab vehicles.

Which Ram models will feature the new 2025 Cummins engine?

The engine will be available in the 2025 Ram 2500, 3500 Heavy Duty Pickups and Ram 3500, 4500, and 5500 Chassis Cab trucks.

How long has Cummins extended its partnership with Stellantis for Ram vehicles?

Cummins has extended its partnership with Stellantis to supply Ram Brand through 2030.

What are the key improvements in the 2025 Cummins 6.7L Turbo Diesel engine?

Key improvements include a new 8-speed transmission, enhanced towing capabilities, reduced noise and vibration, advanced emissions handling, and improved serviceability features including top-side maintenance access and in-cab software updates.