Power:260 - 380 hp<br/> Torque:860 - 1250 lb-ft<br/> Certification:EPA 2021

Heavy Duty capability in a medium-duty package
The next generation of L9 engines does more than just provide the power, reliability and durability you need to get the toughest jobs done. The 2021 L9 delivers class-leading power and torque ratings, an unmatched power-to-weight ratio, and the dependability and uptime you expect from Cummins. But we didn’t stop there. The 2021 L9 Productivity Series engines are up to 1.5% more fuel efficient than the 2017 models. The 2021 L9 Performance Series engines will see up to a 3.5% fuel economy improvement.

How’d we do it? We started by decreasing frictional losses in the base engine and optimizing combustion. We also incorporated a new piston design, optimized camshaft valve timing and reduced water pump speeds to minimize parasitic losses.

All About Uptime:
To improve Uptime we synchronized and extended the recommended engine maintenance intervals, so fleets can go longer between oil drains intervals and oil and fuel filter changes. Because trucks go longer between trips to the garage for scheduled maintenance, money goes back to your bottom line. 
 

Features & Benefits
VGT® Turbocharger from Cummins Turbo Technologies - The patented design is widely recognized as an industry performance leader. Electronic actuation improves precision and responsiveness. The VGT Turbo is a key element in providing exceptional fuel economy and braking horsepower
Connected Diagnostics™ - Wirelessly connects your engine to Cummins through a telematics device for immediate diagnosis of a fault alert. Provides a clear recommendation for continued operation, or the need for service, within seconds.
XPI Fuel System from Cummins Fuel Systems - Delivers superior performance even in lower engine rpm ranges. Enables multiple injection events per cycle, for improved fuel efficiency with quieter, smoother operation.
Single Module Aftertreatment From Cummins Emission Solutions -
Combines high-efficiency SCR, a more reliable dosing unit and a DPF into a single flow-through unit. It is up to 70 percent smaller, so it’s easier to install, and as much as 30 percent lighter than the aftertreatment units it replaces. Better heat management improves fuel efficiency and minimizes periodic maintenance.
Fuel Filters And Lube Filters From Cummins Filtration - Fleetguard® filters protect against corrosion and contaminants with innovative technology, including NanoNet® media, which provides 10 times better protection than conventional fuel filters.
Single High-Capacity Electronic Control Module (ECM) - A higher capacity offers faster processing of more information, fully integrated control over the engine and aftertreatment system for optimized performance and improved engine lamp strategy.