Cummins legendary ISX15 heavy-duty truck engine has been an industry favorite for nearly 20 years. In 2017, Cummins engineers are taking reliability, performance and efficiency to the next level with full production of the X15 Performance and Efficiency Series engines. The new X15 engine platform is an innovative approach to duty-cycle optimization, with two distinct engine series offerings so that owners don’t have to compromise.
X15 Performance Series Engines
are designed to deliver ideal power for heavier loads. With ratings from 485 hp to 605 hp and available torque up to 2,050 lb-ft, the X15 Performance is a real powerhouse. An upgraded high flow air-handling system provides faster pedal response and superior drivability for full payloads and steep grades. Peak torque across a wide rpm range and exceptionally strong engine brakes only add to the appeal of this extraordinary engine.