Jacobs Vehicle Systems has announced an optimized engine brake for the 2017 Cummins X15 engine designed to add additional braking power from the engine compared to past models. Jacobs Vehicle Systems ...

Jacobs’ optimized engine brake for the 15-liter 2017 Cummins X15 engine is designed to capitalize on the optimization of the VGT and braking cam to deliver 10 percent additional braking power at ...

Cummins 2027 X15 engine debuts at TMC with up to 605 HP, 2,050 lb-ft of torque, and an updated aftertreatment system.

X15 diesels showed quick throttle response and strong acceleration on the TRC's tracks. Engine brakes were impressively strong, even at low rpm's. A parade of X15-powered tractor-trailers led the ...

Cummins’ 2027 X15 brings a new engine design and updated emissions system to meet stricter NOx rules while maintaining performance.