Is porche cayenne turbo yr model 2004 a twin turbo or single turbo?

TWIN.............On the new Cayenne Turbo, engine performance is dramatically enhanced by twin turbocharger units. The lowvolume intake pipes combine with short exhaust manifolds to achieve acceleration response that is nothing short of astonishing. Porsche engineers continue to refine the science of turbocharging. In the Cayenne Turbo, the incoming air is passed through a filter and compressed by the turbine units. Its temperature is then reduced in the intercooler system, thereby improving cylinder charging and reducing thermal loads on the engine. Boost pressure is controlled by the engine management system,reaching as much as 26.1psi (absolute pressure) under full acceleration from just 2500 rpm. Under “normal” driving demands(part-throttle mode), the boost is adjusted to help optimize fuel economy. When the driver demands more from the Cayenne Turbo (full-throttle mode), the turbines increase the amount of pressure available. Press the throttle assertively, and the boost can be applied immediately. There’s virtually no “turbo lag,” just the seamless delivery of phenomenal engine power—up to 500 horsepower and 516 lb.-ft. of torque. To help prevent the turbine units from reaching temperatures where oil degradation would otherwise occur, both turbochargers are cooled by dedicated circuits from the main engine cooling system