Porsche 911 GT3 RS 4.0: Biggest 911 Engine Ever Offered

Porsche keep pushing the performance envelope and this time it?s the 911 GT3 RS that gets the attention. The track-inspired production car with a new 4.0 designation will be offered in a limited edition of 600 vehicles worldwide. The motorsport-derived 4.0-liter engine, already the highest displacement 911 engine ever, also features the highest per-liter output…

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