October 21, 8pm on National Geographic Channel! - Get a behind-the-scenes look at where Porsche builds their beasts on wheels on Thursday, Oct. 21 when watching National Geographic’s “Ultimate Factories.” Rolling of the assembly line and taking the world by storm in 1964, the Porsche 911 is now one of the world’s iconic sports cars. Still produced on the same grounds that gave birth to the first 911, this car has grown to 14 variations. From the modest 911 Carerra with a top track speed of 185 mph to the 911 GT3, a street legal racecar that tops out at 194 mph, this Ultimate Factory, in Stuttgart, Germany, can offer a color, style, and speed for even the most fastidious driver.