A work machine having an internal combustion engine such as a diesel is connected to a transmission by a flexible coupling. The engine may have a turbocharger to increase its output. A power turbine is connected to receive exhaust products from the turbocharger turbine via an exhaust aftertreatment device. The power turbine is connected to either the transmission downstream of the flexible coupling or to an external load. In either case, the power turbine in the form of a centripetal turbine is isolated from the torsional vibrations of the IC engine.