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Porsche 911 GT3 wows the crowds in Geneva

Porsche has a long and storied history of taking its range-topping 911 sportscar racing, with an enviable record of achievements in tow. The latest machine with which the automaker will take to the track can be seen above: the fifth-generation 2014 911 GT3.
With 475 horsepower strumming through the 3.8-liter six-cylinder boxer engine, this is the pinnacle of naturally aspirated performance from Porsche. It can go from 0 to 60 in just 3.3 seconds, hit a top speed of 195 miles per hour and has lapped the Nürburgring Nordschleife in less than seven and a half minutes.
A dual-clutch PDK transmission (no standard manual gearbox will be offered) with shorter gearing than lesser 911 models sends power to the rear wheels. Providing forward motion isn't the only thing those rear wheels will be doing - Porsche says the 2014 911 GT3 is fitted with the manufacturer's first active rear-wheel steering.

Jay Leno chats with Magnus Walker about his 1972 Porsche 911 72STR

Magnus Walker has stopped by the Big Dog Garage again to pay Jay Leno a visit in the latest episode of Jay Leno's Garage. This time, the Porsche builder brought along his 1972 911 72STR 002. Walker calls the machine his best build to date, and the car is a rolling "best of" from Porsches past, rocking some of the more attractive elements pulled from a wide arc of 911 model years. Of course, the machine also wears a few signature Walker touches, including flush-mount turning indicators, a center-hood fuel filler and plenty of louver work.
Unlike some of Walker's other creations, the 72STR 002 is clean enough to lick. Leno seems suitably impressed with the creation, and while apparently isn't typically a fan of Porsche models in general, Walker's tastefully modified 911 has him singing a different tune. You can check out the car in the video below.

'Faster. Farther.' dives into the history of Porsche racing tech

No doubt, Porsche has produced some of the best endurance racecars around, such as the turbocharged, slant-nose 935 of the 1970s and the ground-effects-enhanced 956 and 962 of the 1980s. But the company's most famous racecar, its first overall winner at the 24 Hours of Le Mans, was the 917.
The 917 embodied many of Porsche's technological achievements up to that point, such as the company's first 12- and 16-cylinder engines (the flat-16 was never used in competition), fiberglass bodies that implemented early aerodynamic practices and the use of new, exotic materials, such as magnesium and titanium.
The racecar was commissioned by the head of Porsche Motorsports, Ferdinand Piëch, to win overall at the 24 Hours of Le Mans in 1970, after he realized a loophole in the rules that allowed cars to compete with engines up to five liters in the Sport category if they were also production models. Piëch saw opportunity: the top prototype class was restricted to three liters; the production minimum to compete in Sport was 25 cars. And so, with much effort, Porsche assembled 25 "production" 4.5-liter 917s and had them parked in a neat line for the race inspectors to verify their legitimacy. It didn't take long before people realized the new Porsches were much faster than the prototype racers, with a top speed approaching 250 miles per hour.