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Turbo Charger Sport 997 Turbo K-04/K-26 Variable geometry turbocharger (VTG) is designed to allow the effective A/R ratio of the turbo to be altered as the conditions change. This is done as the optimum A/R at low engine speeds is very different to the optimum at high engine speeds. By altering the geometry of the turbine housing as the engine accelerates, the turbo's A/R ratio can be maintained at its optimum. Because of this, our VTG turbochargers have almost no lag, have a low boost threshold and are very efficient at higher engine speeds.This set should only be fitted by engine builders or tuners as other performance parts may be required Fits:Porsche 997 Turbo
