Cor. The Porsche 911 GT3 RS is (spoiler alert) such a wonderful thing. Every time Porsche releases a GT-model 911, it's terrific, and we wonder how they make it better. And then they do. Subscribe now: http://smarturl.it/autocar This time, that comes with a power upgrade to the 911 GT3's 4.0-litre engine - which is basically a Cup race car engine - taking it to 513bhp (520 metric hp). It revs to 9
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