You're looking at not only the most powerful non-turbo Porsche of all time but probably the last-hurrah for the non-turbo 911.
With the iconic sports car due to get a fully turbocharged engine range from next year in the interests of efficiency, this Porsche Motorsports-tuned 4.0-litre flat-six is likely the 911's naturally aspirated swan song.
Good thing it's packing a full-on 500hp then, which should make the music nice and loud. There's a weight reduction too thanks to a magnesium roof and lots of carbon fibre, although it's actually only 10kg lighter than the standard 911 GT3. The engine, which has the largest displacement and most power of any naturally-aspirated power unit with direct fuel injection in the 911 family, accelerates the high-performance sports car from 0 to 100 km/h in 3.3 seconds and on to 200 km/h (124 mph) in 10.9 seconds. Combined NEDC fuel consumption is 12.7 litres/100km.
There's all sorts of clever stuff going on here. The standard-fit DSG paddle shift gearbox has a 'paddle neutral's system that mimics the effect of dipping the clutch on a conventional gearbox - perfect for kicking the tail out for full on power slides. There's also an electronic pitlane speed limiter, which will be as useful for track-days as it is for keeping your speed in check on Acton high street.
The RS is also, of course, all about lightweight. The roof is magnesium; the engine bay and boot are made of carbon fibre. It cuts a mere 10kg from the weight of the standard 911 GT3 but the extra power more than compensates and anyway, the GT3 is already pretty light.
There's also a massive rear wing for proper on-track downforce and a cute little dip that runs along the bonnet and up into the roof that references hard-core 911s of days past.
The chassis of the 911 GT3 RS has been tuned for maximum driving dynamics and precision. Rear-axle steering and Porsche Torque Vectoring Plus with fully variable rear limited slip differential increase agility and dynamics, and the wider front and rear track widths enable even higher roll stability than in the 911 GT3.
Don't expect much change from €260,000 if you want one of these...