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From Car and Driver

With the knowledge that Porsche has baked a hybrid variant into the product plan of the latest 992-generation Porsche 911, the electrical whine and additional forward thrust produced by this modified 991-era 911 Carrera provides a tantalizing glimpse into the future. This is the effect of the Vonnen Shadow Drive (VSD), an aftermarket hybrid conversion designed by Vonnen Performance that, provided you can justify the not-insignificant cost, integrates a battery and an electric motor into Zuffenhausen’s sports car years before the factory gets around to it.

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The Shadow Drive is a clever setup that adds up to 150 horsepower and 150 lb-ft of torque to the crankshaft of a 911’s internal-combustion engine, yet without significantly tampering with

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