The X12 engine is an optimal choice for vocational and regional haul truck fleets that need maximum payload without compromising performance capability. Vocational customers with the EPA 2021 X12 will be especially pleased with the option to reduce engine noise both in operation and at idle through an air compression resonator. Plus, vocational ratings maintain a governed engine speed of 2000 RPM, which optimizes driving performance while allowing for greater flexibility in axle ratio and transmission selections.

The X12 is designed to give weight-sensitive applications maximum payload. And at just 2,050 lbs., the X12 is at least 150 lbs. lighter than the lightest competitive 11L engine, yet it still delivers powerful performance from 350-500 HP and 1250-1700 lb-ft Torque. With the response and power of larger displacement engines, the X12 delivers the performance drivers desire while maximizing efficiency for every job.  

For the 2021 X12 we’ve updated our engine with a focus on improved reliability, lower maintenance cost, better performance, while meeting more stringent EPA Greenhouse Gas standards. The good news for Motorhome & RV customers is that lower Greenhouse Gas emissions means improved fuel economy. We’ve been able to do this by optimizing our existing technology, rather than introducing new emissions equipment. 

Cummins has been powering the fire service since 1937. The 2021 X12 engine was designed to serve the fire & emergency market, with a focus on improved reliability and better performance, while meeting more stringent EPA Greenhouse Gas standards. We’ve been able to optimize the existing technology we are experienced in, without the need for additional emissions equipment. 

746-1044 kW | 1000-1400 hp Building on the KTA38’s reputation hard earned on the U.S.

Uptime The 2020 X15 Efficiency Series incorporated key product improvements to meet the 2021 emissions standards. Cummins measures the performance of product launches through metrics like “percent zero touch” and “touches per thousand” in order to quantify product reliability and uptime. The 2020 product launch was the best performing product launch to date, and with minimal changes for the 2021 launch, we expect he trend to continue. Cummins offers the longest service intervals in the industry – keeping you on the road and out of the service bay. 

Uptime The 2021 X15 Performance Series incorporated key product improvements launched with the 2020 X15 Efficiency Series and builds off the most successful product launch in Cummins history. With the best “Percent Zero Touch” and lowest “Touches Per Thousand” metrics to date, Cummins expects the trend to continue with the 2021 X15 product lineup.  Cummins offers the longest service intervals in the industry – keeping you on the road and out of the service bay.

The next evolution of the ISL is a continuation of the current product strategy.  Cummins utilized product upgrades and emissions credits for a certified solution.  By choosing the right technology for each market, Cummins ensures the highest quality launch at the lowest possible installed cost. Key features include: