Dodge 2007.5-2012 6.7L Cummins Genuine Holset Stock Replacement Turbo

The Holset VGT uses a turbine stage where the swallowing capacity is automatically varied while the engine is running. This permits turbine power to be set, providing sufficient energy to drive the compressor at the desired boost level wherever the engine is operating. This is achieved by varying the area of the nozzle; a set of guide vanes that control the flow of exhaust gas through the turbine.

Conventional designs pivot the vanes to achieve different nozzle areas. The Holset VGT is extraordinary in that the vanes do not pivot but slide axially; this design ensures a high level of durability and reliability, essential for today’s commercial diesel applications. In addition, the vanes are fixed in an optimum position that creates the most favorable angle of incidence of the exhaust gas onto the turbine wheel blades thus raising average turbine efficiency throughout its operating rang