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.

On time and on budget Cummins L9 diesel delivers outstanding productivity with the best power-to-weight ratio in its class. Heavy-duty features such as a replaceable wet liner, roller followers, bypass oil filtration and targeted-piston cooling add years of engine life. Furthermore, transit fleet managers can expect a fuel economy improvement of up to 15 percent compared to buses purchased 10 years ago.  

The L9N is the natural choice in alternative-fuel engine technology. With industry leading performance, it combines all the advantages of clean burning, low cost natural gas with “no compromises” in power and torque. The L9N  is an upgraded evolution of the proven ISL G, moving to the latest Euro 6 Phase D emissions with minimal changes retaining the impressive low-end toque, transient response and quiet operation for bus and truck applications.

It is an in-line 4-cylinder, 16-valve, 4-stroke 4.5-liter diesel engine Available for commercial and recreational propulsion applications Based on the proven Cummins B4.5L industrial engine The B4.5L complies with U.S. EPA Tier 3 emissions regulations without the use of aftertreatment Backed by Cummins warranty