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Naturally aspired?

Prototypes of Cadillac's next generation CTS and CTS-V sedan have been spotted doing their rounds at Germany's famous Nürburgring racetrack, as well as at various testing spots in the US.

Now these latest photos, taken in the US and in Germany, capture the new Caddy with its hood open. The wide silver bar across the rear of the engine compartment looks to be a prototype model of a strut bar, stiffening the connection between the tops of the strut mounts.

The wide intake plenum makes it appear that the engine is naturally aspirated, not turbo or super-charged as has sometimes been speculated.