Our spies have gone in overboost mode in regards to the new BMW M4 Coupe securing another round of shots of the prototype finished in a Silverstone Metallic color (think ice-blue), while it was being thrashed in its…natural habitat, the Nürburgring Nordschleife.
But that's not the only news we have on the M4 as this morning, we were notified by the team over at the F80Bimmerpost forums about some fresh information on the car's powertrain specs.
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