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A mysterious Nissan GT-R prototype has been spied undergoing testing in Europe.

Caught wearing a heavily camouflaged front bumper, the model could either be a facelifted version of the current model or a test mule for the next-generation GT-R.

It's hard to know what Nissan is hiding but the GT-R has a history of receiving annual updates. That being said, the next-generation GT-R is expected to arrive in 2017 or 2018, so it's about time for mules to start being tested.

Regardless of what the model is, the next-generation GT-R is expected to be heavily influenced by the Concept 2020 Vision Gran Turismo which was unveiled earlier this year. The car is also rumored to have a hybridized powertrain that consists of a 650 bhp (485 kW) twin-turbo 3.8-liter V6 and a 134 bhp (100 kW) electric motor. If these numbers plan out, the model could have a combined maximum output of 784 bhp (585 kW).

Gallery: 2017 Nissan GT-R mule spied?

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