The rear of the track-only model is dominated, in contrast to the road-going McLaren P1™, by the presence of a fixed-height wing which sits more than 400mm above the sculpted rear bodywork - an increase of over 100mm of the adjustable wing on the road car. The weight saving measures on the McLaren P1™ GTR combine to strip out 50kg over the road-going model. The chemically toughened glass panels in the roof have been replaced with carbon fibre panels to give the cabin a more enclosed, cocooned environment, as has the engine bay cover. The lightweight windscreen from the McLaren P1™ road car, measuring just 3.2mm thick, has been retained, while the side windows are now motorsport-specification polycarbonate with a sliding 'ticket window' on the driver's side. The lower bodywork is trimmed with a sleek aerodynamic blade as previewed on the design concept, which cleans the flow of air along the car's flanks. The front track is 80mm wider than the road-going McLaren P1™ and with its aggressively profiled front splitter, the also car sits 50mm lower to the ground on centre-locking 19-inch motorsport alloy wheels shod with Pirelli slick tyres. This has produced enhancements to the original design to optimise aerodynamic performance and cooling. The McLaren P1™ GTR has completed an extensive and intense testing schedule across the world following the unveil of the Design Concept at the Pebble Beach Concours d'Elegance last summer. The design is homage to the yellow and green McLaren F1 GTR, chassis #06R, which has claimed its own place in history as one of the five F1 GTRs that dominated the 24 Hours of Le Mans in the historic debut by McLaren 20 years ago. It is one which will be available to the fortunate few who will be joining the McLaren P1™ GTR Driver Programme that kicks off at the Circuit de Catalunya in Spain in 2015. The most noticeable change is the livery that the Geneva show car will be sporting. Sources:, ,, bbc.com,, .The track-dedicated 1000PS McLaren P1™ GTR will debut at the 2015 Geneva Motor Show in limited production form with only minor modifications to the Design Concept presented just six months ago. McLaren then put his designers to work making a texture similar to that of sailfish scales inside of the ducts leading to the P1's engine, increasing air intake into the engine by 17%. These, in turn, give the fish a bubble of air to travel in that reduces drag and increases speed. The sailfish have scales that create miniature vortices. The sailfish is essentially a “turbo swordfish” that exhibits bursts of enhanced speed in order to catch prey. That said, it was not the first incident of automotive companies to adopt natural techniques into their vehicles. Carmakers there began to research just why the sailfish was so quick. After that, he had it scanned in the scanning department of the McLaren Automotive aerodynamics laboratory in Surrey. Stephenson then stopped in Miami and bought a sailfish from a local fisherman. After its validation tests proved successful, the XP05 went on to become a GTR track car, being displayed in booths in the auto show circuit. The XP05's specialty was to test gearbox calibration and Bosch injection development. One surviving prototype is the XP05, which is one of 14 experimental prototypes the P1 GTR had. However, once in a while, like with the P1 GTR, the prototype is spared destruction and goes on to become an actual road car. The prototype is often crushed upon completion of its validation tests, now considered obsolete that it's served its intended purpose. This helps the engineers find a way to prevent breakage when the actual model is debuted on the sales floor. It needed validation tests, which make certain areas of a vehicle prone to high-stress situations, giving engineers an idea of what on a car and where a car will break first. As with most new vehicles, the P1 GTR had a prototype made prior to its release for engineering and testing purposes.
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