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The global trends towards increasingly stringent vehicle emisesions and fuel consumption regulations are driving the design of Honeywell Turbo Technologies Variable Nozzle Turbine Turbochargers. The latest HTT VNT generation, "GTD", is currently being released on a large number of EU6 applications globally, covering the full spectrum of engine displacements in Passenger Cars. This paper presents the GTD product range from GTD10 for 50 kW to GTD22 for 200+kW engines. It discusses the full development methodology, from the definition of performance targets to final product validation. This includes in particular the performance optimization process including aerodynamics and bearing developments, as well as Variable Nozzle Turbine kinematics optimization.