The Productivity Leader.Cummins X12 redefines the entire medium-bore engine category (10L-13L), setting new standards for productivity in motor coach applications. It’s performance that is not just unchallenged – it’s unbeatable. Smaller in size – at least 150 pounds lighter than the next closest competitive engine and up to 500 pounds lighter than other medium bore engines – the X12 still delivers powerful performance from 410 hp to 455 hp and 1450 to 1700 lb-ft of peak torque. At just 2,150 pounds, it has the highest power-to-weight ratio of any heavy-duty engine. The combination of power and efficiency is striking.

The Best Of All Worlds.
A legacy of proven performance goes into every Cummins X12. From L10 and M11 in the 1980s to ISM and ISX engines through the turn of the century, we’ve been building on a proven platform designed for maximum uptime and productivity. The X12 will be built in Jamestown, N.Y., in the same production facility as the Cummins X15, and will share many heavy-duty components, including our proprietary Cummins Holset VGT® Turbo, XPI fuel system, Electronic Control Module (ECM), our new Single Module™ aftertreatment system and ADEPT™ advanced electronic features. It’s an engine platform that’s been tested and is delivering in the toughest, most challenging operations around the world.

The X12 is designed to deliver exceptional throttle response for inner-city operation, especially when paired with an automated manual transmission. Plus, its compact size enables shorter bumper-to-back of cab (BBC) dimensions with improved maneuverability. A new Cummins engine brake improves stopping power and lengthens service brake life. Drivers will really like the way the X12 performs, whether the traffic light is turning green or red.

Trust Makes All The Difference.
The most reassuring part of owning any Cummins-powered vehicle is knowing that we’ve always got your back. Cummins engine experts and our extensive training programs ensure service and support excellence that you can depend on. No matter the situation. We are committed to the success of your business, which means complete dedication to working with you as a partner on everything from upfront vehicle and engine spec’ing to maximizing your uptime out on the road. You aren’t just buying a Cummins engine – you’re buying Cummins expertise and commitment anywhere and everywhere your business takes you. And no matter where that is, peace of mind is always nearby with over 3,500 authorized Cummins parts and service locations throughout North America.