Cummins Details 6.7L Turbo Diesel's Holset HE300VG 8th-Gen Turbocharger
Cummins' new 6.7L Turbo Diesel engine features an 8th-generation Holset turbocharger with a patented vane system that improves efficiency by 4 percentage points.
430 hp, 1,075 lb-ft
360 hp, 800 lb-ft
4 percentage points
What Happened
The 8th-generation Holset HE300VG variable geometry turbocharger features a patented multi-clearance vane system, new compressor and turbine wheel designs, and refined electronic controls for precise airflow management. These innovations provide a 4-percentage-point efficiency improvement, smoother acceleration, stronger towing performance, and best-in-class engine braking.
4 percentage points
over the previous HE300VG generation
- RAM 2500 Heavy-Duty pickup
- RAM 3500 Heavy-Duty pickup
- RAM 3500, 4500, and 5500 Chassis Cab trucks
Every turbocharger used in the 2025 6.7L Cummins Turbo Diesel engine is designed, manufactured, and assembled in the United States at Cummins' Charleston Turbo Plant (CTP) in Charleston, South Carolina. From there, turbochargers are shipped to the Cummins MidRange Engine Plant in Columbus, Indiana, for installation on engines destined for RAM assembly lines.
Why this matters
This advanced turbocharger helps the Cummins 6.7L diesel engine deliver more power and efficiency while maintaining reliability, benefiting RAM truck owners who rely on heavy-duty performance.
Terms in This Story
- Holset
- A brand of turbochargers owned by Cummins.
- Variable geometry turbocharger
- A turbocharger with movable vanes that optimize airflow across engine speeds.
- Boost control
- Management of intake air pressure to optimize engine performance.
- Low thermal inertia design
- A design that allows the turbocharger to heat up quickly for faster warm-up.
Summarised from the linked release; details can be imperfect — always verify against the original source.