Built to serve the fire service, the Cummins X12 provides the highest power-to-weight ratio of any heavy duty engine.

Whether you’re operating a regional haul or local duty-cycle, the Cummins X12 offers maximum payload for your weight-sensitive application. Customers with Refuse trucks, Mixers and Tankers can set their expectations high with the X12.

Proven Performance. With its sculpted block and advanced components, Cummins X12 engine is the power-to-weight leader in its engine class, delivering up to 513 hp in an engine that weighs just 1900 lbs (862 kg). It features a Cummins-designed wastegated turbo for a torque rise of as much as 60 percent, so it responds faster to increasing load factors even at lower engine rpm.

How do you make the industry-leading 15-liter engine even better? You talk to customers, spend thousands of hours on a dynamometer and run 9 million real-world test miles to deliver better performance, reliability and support. Reliability.

Proven To Deliver. Cummins X15 is an undisputed leader in its class. Cummins award-winning VGT™ Turbocharger sets the industry standard for reliability and durability while delivering exceptional throttle response. This, together with the Xtra-High Pressure Injection fuel system delivers 15 percent greater horsepower with 60 percent more torque rise than its predecessor.