Cummins ISX15
Heavy Haul. Regional Haul. Your Haul.

Highly adaptable to a wide variety of needs, the Cummins ISX15 is one of the most popular heavy-duty engines in North America. Choose the performance that matters to you with horsepower ratings options from 400hp-600hp and up to 2,050 lb.-ft. of torque. A standard engine brake and impressive power confirm the ISX15 is a proven and compliant platform, always ready to get your job done.
Outstanding Fuel Economy
When you need extreme horsepower without sacrificing on fuel economy, the ISX15 is the engine for your job. The Cummins ISX15 engine delivers impressive fuel economy with improvements to the water pump, fuel pump, piston oil rings and piston cooling nozzle to reduce parasitic losses. The XPI Fuel System delivers a precise quantity of fuel at ultra-high pressures. This, together with more robust electronic engine controls, enables multiple injection events per cycle.
Excellent Power
The Cummins ISX15 combines the brute power needed to haul loads up steep inclines with fuel economy that your bottom line will appreciate. With a broad range of horsepower ratings up to 600hp and 2,050 lb.-ft. of torque, the ISX15 has the power to get any job done right. The variable geometry turbocharger enhances response and control with electric actuation for infinite adjustment, providing exact boost at any rpm.
Proven Solution
A demonstrated B50 life of more than 1 million miles proves the ISX15 is a durable platform. With over 200,000 vehicles in service with Cummins SCR after treatment, you know the ISX15 is being combined with a proven aftertreatment system for a combination of power and reliability.
Support Network
The International® Truck and Cummins partnership offers unrivaled service and support. With International’s industry leading number of service locations combined with Cummins’ widespread service and support network in North America, it is easy to find authorized service technicians who are fully trained and have the necessary equipment and Genuine Cummins Parts to promptly handle any type of service issue. Representatives are standing by every hour of every day, to check with local authorized Cummins distributors and dealers to determine the nearest facility with an available technician and the right diagnostic and repair tools to handle your equipment issue.

Cummins ISX15 Specifications

  • Engine Type

    Diesel, 4-Cycle

  • Configuration

    Inline 6-Cylinder

  • Displacement

    14.9 L (912 cu. in.)

  • Bore and Stroke

    5.39 in. & 6.65 in. (137mm & 169mm)

  • Combustion Ratio


  • Aspiration

    Variable Geometry Turbocharger

  • Combustion System

    Direct Injection XPI Fuel System

  • Lubricating System Capacity

    56 quarts (53 L)

  • Dry Weight

    3,186 lbs.