“Instantly, that motor kicks in, boosting the native engine’s horsepower and torque by roughly 50 percent and giving me an idea of how Popeye feels after gulping spinach.”



“Suddenly, 3.4 liters turns into what feels like 5.0. The difference in thrust is unmistakable.”

-Road & Track


“Shadow Drive delivers better than your typical aftermarket power-adder in every way.”


Shadow Drive is available for select Porsche models exclusively from Vonnen and Vonnen authorized dealers for $75,000 installed in your vehicle.

For more info or to arrange a test drive today:

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