Cummins B6.7
The Best-Selling Engine in the Medium-Duty Truck Market

Engineered for reliability, durability and fuel efficiency, the Cummins B6.7 doesn't have an off day. With an impressive range of horsepower for a variety of medium-duty applications, every aspect of the B6.7 has been improved to deliver the lowest cost of ownership with maximum uptime. Add in industry leading service from International® Trucks and Cummins, plus a two-year, unlimited mileage engine warranty, and you're sure to have an engine that's always ready to work when you are.

Excellent Power

The B6.7 features High Pressure Common Rail (HPCR) fuel injection for constant pressure and strong performance at every rpm. Multiple injection events per cycle make this engine quiet and smooth to operate. Ratings range from 200-325 hp (149-242 kW).

Fuel Economy

The B6.7 gets the highest fuel economy of any engine in its class. The addition of an air intake throttle makes the exhaust gas recirculation (EGR) system more efficient, reducing parasitic losses to increase fuel economy and lower operating costs.

Trusted Reliability

Base engine warranty coverage for the B6.7 includes parts and labor on warrantable failures for the base engine and the aftertreatment system. Cummins base warranty coverage is good for two years/unlimited mileage. Extended coverage plans are available for the base engine and aftertreatment system.

Cummins B6.7 Specifications

  • Engine Type

    Diesel, 4-Cycle

  • Configuration

    Inline 6-Cylinder

  • Displacement

    409 cu. in. (6.7L)

  • Bore and Stroke

    4.21 X 4.88 in

  • Combustion Ratio


  • Aspiration

    Variable Geometry Turbocharger

  • Combustion System

    Direct Injection

  • Engine Lubrication


  • Total Engine Weight (Dry)

    1,150 lbs.

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