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"McLaren&amp;#039;s 12C GT3 race car, as seen in this week&amp;#039;s Chris Harris on Cars, is an awesome thing to behold. It&amp;#039;s low, wide and has all the additional wings, splitters and air intakes you would hope to find on a GT racer in just the right places. It&amp;#039;s all very dramatic to take in, but it&amp;#039;s not the most interesting thing about this car.  What is interesting is what has changed in the transition from road car to race car. The 12C road car has been with us for a few years now, but the raft of new technology it brought to the realm of supercars is still no less impressive. Its semi-active hydraulically controlled suspension eliminates the need for anti-roll bars and recalibrated our notions of how a supercar should be behave on the road. The rear differential is open and uses a brake steer system to control the speed of each rear wheel. The dual clutch gearbox is smart enough to know what gear you&amp;#039;re going to select before you do.  The 12C GT3 uses none of these systems. The suspension is a more conventional damper and anti-roll bar affair. The rear diff is a traditional limited slip unit and the transmission is a single clutch sequential gear box. When it comes to race cars, simplicity is often the best approach. The engine is also about 130 hp down on power from the road car to conform to GT3 regs.  How do all these changes add up? McLaren invited Chris Harris to Snetterton to find out. It&amp;#039;s a purpose built race car, so obviously is very fast, but as you might suspect the result is a very different 12C from what you would find on the road.      "^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.roadandtrack.com/new-cars/videos/a6039/mclaren-12c-gt3-chris-harris/>