2021 X15 Productivity Series Engine

X15 Productivity Series (2021)

Power 430 - 605 hp
321 - 451 kW
Torque 1650 - 2050 lb-ft
2237 - 2779 N•m
Certification EPA 2021

The Power to Deliver.

You get the best of both worlds with horsepower and torque curves optimized for the most challenging applications. Whether you’re transporting raw materials in quad-axle dump trucks, moving 130,000 lbs down the interstate, or fall into a multi-purpose category, you’ll get access to whatever blend of power or efficiency you desire with the EPA2021 X15 Productivity Series.


Heavy-Duty Truck Truck Equipment Manufacturers and Body Builders Motorhome and RV Engines Fire and Emergency Vocational


Easily recognized by the “V” designation on the ratings chart, Productivity Series ratings have a higher output capacity (up to 605 hp with 2050 lb-ft of peak torque) than any other engine in the 15-liter category. More important, the component set delivers superior responsiveness to throttle input – engineering-speak for plenty of muscle to get you rolling up to speed with a full load on hilly terrain.

The Best of Both Worlds.

2021 X15 Productivity Series ratings from 430-500 hp share a hardware set with the Cummins X15 Efficiency Series ratings. The higher output ratings from 565-605 hp use higher-capacity components from the X15 Performance Series ratings. This dual engineering strategy ensures that the X15 Productivity Series has the output required to meet power demands while optimizing fuel economy and operating costs. The rpm levels are set to match the job requirements of specific applications. Cummins continues to offer both Rear Engine Power Takeoff (REPTO) and Front Engine Power Takeoff (FEPTO) on X15 Productivity Series engines.

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Improvements Across The Board.

The X15 ratings for 2021 provide greater turbocharger airflow and a high performance EGR cooler for overall air handling improvements and greater efficiency throughout the system. Even the X15’s best-in-class engine brake has been improved with EGR Assist Braking. A more robust design means more reliable performance.

Uptime. All The Time.

When you purchase a piece of Cummins-powered equipment, you’re getting more than just a powerful, reliable and durable powertrain. You’re getting advanced technology and 24/7/365 coverage from Cummins Care, the most extensive and competent parts and service network (over 3500 locations) in North America. X15 engines are equipped with our proven Connected Diagnostics system for rapid analysis if a fault is triggered. Connected Calibrations,™ our Over-the-Air (OTA) engine customization technology, lets you upgrade your engine calibration on the job site. There’s no need to visit a dealer to get the latest configuration. Everything we do is designed to reduce downtime and increase productivity – because that’s the fastest route to greater profits.

Total Optimization.

Optimization with the X15 Productivity Series doesn’t end with the base engine, in fact it only begins there. Cummins manufactures related technologies such as the Single Module aftertreatment, VGT turbocharger and Fleetguard filters to ensure that everything is integrated and optimized for your operation. Cummins has decades of experience in partnering with transmission manufacturers in order to collaborate on integrated powertrains. This means you’re getting the best engine and best transmission for your application and they’re optimized to work together seamlessly.

Advertised Horsepower 430-605 hp
321-451 kW
Peak Torque 1650-2050 lb-ft
2237-2779 Nm
Governed Speed 2000 - 2100 RPM
Clutch Engagement Torque 1000 lb-ft
1356 Nm
Number of Cylinders 6
System Weight 3152 lb
1430 Kg
Engine (Dry) 2961 lb
1343 Kg
Aftertreatment System 191 lb
87 Kg

X15 Productivity Series ratings use the same engine hardware as the X15 Efficiency Series when choosing 500 hp or less. These ratings provide access to peak torque starting at 950 RPM and additional 300 rpm or engine operating range compared to the standard X15 Efficiency Series ratings. This extra rpm range provides longer access to peak power – helping you accomplish the most demanding tasks.

Rating Horsepower (Kw) Peak Torque Lb-ft @ 950 RPM (n*m)
X15 430V 430 (321) 1650 (2237)
X15 450V 450 (336) 1650 (2237)
X15 450V 450 (336) 1750 (2373)
X15 470V 470 (350) 1750 (2373)
X15 500V 500 (373) 1650 (2237)
X15 500V 500 (373) 1850 (2508)


X15 Productivity ratings with more than 500 horsepower leverage the hardware capabilities of the X15 Performance Series. Designed to handle even the most difficult and demanding applications, up to 605 horsepower and 2,050 lb-ft of torque makes sure the vehicle pulls, pushes, or transports nearly anything. 

Rating Horsepower (Kw) Peak Torque Lb-ft @ 1000 RPM (n*m)
X15 565V 565 (421) 1850 (2508)
X15 605V 605 (451) 1850 (2508)
X15 605V 605 (451) 2050 (2779)


Torque Curves:

Efficiency hardware torque cruves

performance hardware torque curves

Horsepower Curves:

Efficiency hardware hp curves

performance hardware hp curves

VGT Turbocharger – Featuring a patented sliding nozzle ring, the VGT Turbocharger used on Cummins X15 engines offers higher boost pressures at low engine speeds. In 2021, the 7th generation VGT provides 5% higher turbocharger efficiency through new wheel options and a multi-clearance shroud design. 

XPI Fuel System – High pressure enables multiple injection events per cycle for industry-leading fuel economy and quieter operation. With a standard thermal recirculation valve, the X15 is prepared to handle even the most challenging weather conditions 

Single-Module™ Aftertreatment System – Compact and lightweight, the Single Module Aftertreatment provides better heat management and retention –delivering improved fuel economy compared to previous aftertreatment systems. With a bigger ash capacity and an optimized flow through design, customers will see a significant improvement on DPF-related maintenance in heavy-duty applications compared to previous systems.

Fleetguard Fuel And Lube Filters – LF14001NN lube and FF5971NN fuel filters from Fleetguard allow for up to 100,000 mile maintenance intervals*, and leverage the patented technology of NanoNet® media to optimized performance in real-world conditions, putting less strain on the engine. Trapping 99.2% percent of all harmful fuel particles as small as 4 microns, the engine and injectors are offered the best protection from any contamination.

*100,000 mile maintenance intervals subject to Oil GuardTM analysis program

High-Capacity Electronic Control Module – The 2450 ECM for the 2021 X15 lineup provides improved connectivity and powertrain capabilities. With fully integrated aftertreatment and engine system controls, the electronic control module optimizes performance.

Cummins Engine Brake – With up to 600 braking horsepower, it’s the most powerful in the industry. Stronger braking capacity reduces wear on service brakes and replacement costs

<5.0 MPG
5.0 – 5.9 MPG
6.0 – 6.9 MPG
>7.0 MPG
OIL DRAIN INTERVAL 25,000 mi 50,000 mi 60,000 mi 75,000 mi
X15 OIL DRAIN WITH VALVOLINE PB 30,000 mi 55,000 mi 65,000 mi 80,000 mi
X15 OIL DRAIN WITH CUMMINS OILGUARDTM extensions available extensions available extensions available Up to 100,000 mi
FUEL FILTER* 25,000 mi 50,000 mi 60,000 mi 75,000 mi

If combined percent idle time plus power takeoff (PTO) time is greater than 40% for Shorthaul, Normal, or Light intervals, use the next lower drain interval. 
*For Premium Blue users, the Fuel Filter interval matches the ODI.


<5.5 MPG
5.5 – 6.5 MPG
>6.5 MPG
DPF Ash Maintenance*** 250,000 - 400,000 m 400,000 - 600,000 mi 600,000 - 800,000 mi
DEF 300,000 mi / 6,750 hours
Valvetrain 500,000 mi / 10,000 hours / 60 months
Drive Belts 500,000 mi / 10,000 hours / 60 months
Crankcase Breather N/A
HC Doser N/A

***Cummins recommends using Cummins genuine DPFs over cleaning of the DPF at the DPF ash maintenance interval. Users can experience extended DPF ash maintenance using the DPF maintenance fault lamp (FC5383).

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