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EPA 2021 B6.7™: Time-Tested, Proven to Perform 

Nearly 40 years in production with more than 13-million engines manufactured world-wide, Cummins B Series engine has a performance record that is unmatched in the industry. The combination of compact size, low weight and exceptional power ratings have made it the go-to diesel for mid-size commercial vehicles and more. Continuous improvement has been driven in large part by advanced electronic engine control technology and Cummins proprietary emission controls. The EPA 2021 model has new, extended maintenance intervals for reduced Total Cost of Ownership (TCO). The 2021 B6.7 also meets required Phase II Greenhouse Gas (GHG) emissions standards and On-Board Diagnostics (OBD) compliance with proven technology. The suite of Connected Solutions™ provides over-the-air and real-time data transfer capabilities for everything from performance statistics and engine monitoring to downloading of updates.

The performance ratings range from 280-325 hp with up to 750 lb-ft of peak torque. The six efficiency ratings offer 200-260 hp with peak torque ranging from 520 to 660 lb-ft.

EPA 2021 L9™: Delivering More With Less Energy 

For decades, the L Series platform has been a workhorse of the industry, with the highest power-to-weight ratio in its class. Durability, dependability and features like cylinder liners have given it exceptional rebuildability, adding long-term value. Customers can expect the L9’s Total Cost of Ownership (TCO) to improve even more in 2021, as it utilizes downspeeding technology to deliver peak torque at a lower rpm. Downspeeding enables peak torque speed to drop by 100 rpm on lower hp ratings, and 200 rpm on ratings of 330 hp and above. Peak torque is significantly increased on several L9 ratings, so drivers can look forward to both improved performance and increased fuel efficiency! Plus, there’s less stress and wear on components. TCO is further enhanced with longer maintenance intervals and synchronized service events that maximize vehicle productivity and uptime.

The L9 performance ratings are available at 370 and 380 hp with 1250 lb-ft of peak torque. The L9 productivity ratings offer customers a choice of 6 ratings ranging from 260 to a new offering at 360 hp. Peak torque ranges from 860-1150 lb-ft. Like all Cummins EPA 2021 engines, the L9 meets GHG Phase II and OBD requirements. The suite of Connected Solutions takes advantage of advanced connectivity and data transfer capabilities to add significant value through operational insights and monitoring capabilities.

EPA 2021 X12™: The X-Factor That Makes It Even Better.

The X12 shares a tremendous amount of technology and a manufacturing facility with its big brother, the X15. That’s how it can outperform 13-liter engines and be more efficient than the competition. Its versatility is unsurpassed, equally at home with ratings specifically for vocational applications and another set for linehaul/regional trucking use. Major updates for 2021 include improved engine breathing, which is coupled with an increased compression ratio and reduced frictional losses to increase efficiency. In simpler terms, the engine runs smoother, stronger and uses less fuel – all at the same time. A new optional fuel filter extends maintenance intervals to match oil drain intervals, reducing downtime. Also new for 2021 is the availability of three EX ratings (see separate article) which take advantage of total powertrain synergies when coupled with the Endurant HD transmission to deliver an extra 1.5% fuel efficiency.

There are two sets of vocational ratings for the 2021 X12 – the productivity ratings for refuse have four choices from 350-380 hp and peak torque between 1250 and 1450 lb-ft, and the productivity ratings for other vocational applications, which contain a dozen different ratings ranging from 350 to 500 hp with a peak torque up to 1700 lb-ft.

Customers using the X12 efficiency ratings for line haul or regional trucking operations have 15 ratings to select from, starting at 350 hp and going up to 455 hp. This includes the three EX ratings mentioned earlier and three SmartTorque ratings (designated with an ST).

X15 Efficiency Series: Ahead of its Time. As Usual.

As most everyone is aware, last year’s X15 was already compliant with the 2021 regulations changes, a year ahead of schedule. But the only way to stay ahead of the competition is to push yourself harder than they do. That’s why the 2021 X15 has an improved air handling system that improves the compression ignition event and increases engine efficiency. Noise emissions are reduced at idle, a big benefit for driver satisfaction. And the air filter and oil drain intervals have been aligned to minimize downtime and maximize productivity. Customers have a choice of three different sets of ratings – five traditional ratings (450-500 hp with up to 1850 lb-ft of peak torque), seven SmartTorque ratings that provide an additional 200 lb-ft in the top two gears for fewer downshifts, resulting in better efficiency (400-500 hp with up to 1650/1850 lb-ft of peak torque) and six EX ratings, a total powertrain solution using the Endurant HD transmission and look-ahead data to improve fuel economy (400-500 hp with up to 1850 lb-ft of peak torque). Unique features included with the EX package include Predictive Gear Shifting, On-Ramp Boost, Predictive Braking and Dynamic Power. To learn more about EX ratings, click to view this article.

Cummins digital technology platform gives trucking customers a full set of real-time and over-the-air management technologies to monitor, improve, diagnose and even update engine information.

X15 Productivity Series: Work Gloves, Hard Hat and Steel-Toed Boots Sold Separately.

X15 Productivity Series ratings are designed, built and optimized for vocational,

specialty, multi-purpose and heavy-haul applications. Whether you’re

transporting raw materials in a quad-axle dump, moving 130,000 GVW down

the interstate or need reliability in emergency applications, Cummins delivers

the power you need – with torque to match. Ratings range from 430-605 hp with peak torque of up to 2050 lb-ft. The X15 Productivity Series has the highest output and torque of any Cummins on-highway engine – making it the best choice for heavy-haul applications where having massive pulling power is the most mission-critical factor.

X15 Performance Series: The Power and Attitude to Perform.

The X15 Performance Series delivers more than just power and drivability. Rugged durability

is ensured by the use of proven hardware while continuous improvements have resulted in

reliability that provides peace of mind for trucking operations. The X15 Performance Series now has no overlapping ratings with the X15 Efficiency Series. The three options for 2021 are 525 hp with 1850 lb-ft of peak torque, 565 hp with 1850 lb-ft of peak torque or 565 hp with 2050 lb-ft of peak torque. This is the engine for customers that demand nothing less than the power to perform.

Cummins ISX12N: A Clean-Burning Engine That Can Still Tackle the Dirty Work.

In addition to a full lineup of clean-burning, low-emission diesel engines, your customers have a heavy-duty natural gas option from Cummins. The ISX12N can be mated with the Endurant HD transmission and uses lean-burn technology to deliver diesel-like performance characteristics in class 8 trucks without the need for emission control technologies.

Click here for more on the features and benefits of the ISX12N.

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