Mechanically identical to the standard GT3, the RS or Rennsport model is lighter, stronger and more aerodynamic thanks to unique additions such as a polycarbonate rear window, carbon fibre hood, rear wing and roll cage.
While this prototype model wears a rather ordinary black exterior finish, the final production version will keep the trademark "GT3 RS" side sticker and special coloured wheels, decorative stripe, contrast-painted outside mirrors and rear wing endplates.
The GT3 RS has always been an anomaly, featuring an unassuming normally-aspirated 3.8-litre flat-six engine in its latest guise - hardly the credentials of a supercar - however Porsche has managed to extract an impossible 320kW from this engine.
The result is zero to 100km/h in around 4.0 seconds - fractionally quicker than the standard GT3 - and a top-speed of 311km/h.
A rear shot of the prototype explains at least part of its performance capabilities, with the massively wide tyres on the rear helping immensely with traction.
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