Cummins B6.7 Diesel Engines For Sale

The Cummins B6.7 engine is a 6.7-liter inline six-cylinder diesel that produces 200 to 360 horsepower and up to 800 lb-ft of torque, built for medium-duty trucks, buses, and commercial vehicles. It is the current name for the proven B-series platform, formerly known as the ISB 6.7, and one of the most widely produced diesel engines in the world. The B6.7 has been refined many times over the years to improve performance, reliability, and fuel efficiency. Below is a general overview of the engine's development and specifications history.

Early Versions: The Cummins B6.7 platform traces back to 2007, with power ratings typically ranging from 200 to 325 horsepower. Early versions offered dependable performance for medium-duty applications under the ISB 6.7 name.

Mid-Cycle Updates: In 2010, Cummins updated the engine to improve fuel efficiency and reduce emissions. This update introduced the High-Pressure Common Rail (HPCR) fuel system, which improved fuel atomization and combustion efficiency.

Emissions Regulations: As emissions standards tightened, Cummins added advanced aftertreatment such as Selective Catalytic Reduction (SCR) to reduce nitrogen oxide (NOx) emissions and meet EPA requirements. The engine was renamed the B6.7 around 2017.

Current Generation: The latest B6.7 offers higher power ratings and improved efficiency, along with Cummins' Single Module aftertreatment system, which combines multiple exhaust components into one unit to optimize performance and simplify maintenance.

In terms of compatibility, the Cummins B6.7 is designed for a wide range of medium-duty trucks, buses, and commercial vehicles. It is commonly used across transportation, construction, and agriculture, and integrates easily with many vehicle manufacturers and platforms.

Why Buy a Cummins B6.7 From HD Engines?

Fleets, body builders, and equipment operators choose the B6.7 for its dependability, compact size, and low operating costs. At HD Engines, every B6.7 is run-tested and inspected, listed with its year, horsepower, CPL, and EPA emissions rating. Our team matches each engine to your vehicle by serial number or CPL for a clean installation, and with nationwide freight, buying a B6.7 is straightforward and low-risk.

Buying a new or run-tested B6.7 also costs far less than a full engine replacement through a dealer, and you get a documented engine with a known history. That combination of value and reliability is why so many fleets return to HD Engines for their medium-duty Cummins replacements.

Cummins B6.7 Engines We Carry:

Our inventory spans model years and power ratings, including new and run-tested B6.7 engines from 200 to 360 HP, in EPA13, EPA17, and EPA21 configurations with CM2350 and CM2450 controls. Pricing generally ranges from about $12,000 to $18,500 depending on year, horsepower, and emissions. Whether you need a 200 HP unit for a delivery truck or a 360 HP engine for heavier work, we can match one to your application. Call (786) 377-5210 or email info@hdengines.com.

Overall, the Cummins B6.7 has earned a strong reputation for reliability, efficiency, and versatility, making it one of the most trusted medium-duty diesel engines for truck, bus, and vocational use.