Tuner cars are often works of art, flights of fancy or out-and-out racers, but rarely are the upper echelons of performance-tuned cars graced by models intended as daily drivers. Techart's latest modifications to the 2010 Porsche 911 Turbo are an exception to that rule, however--if you can afford the upkeep. Starting with the Porsche 911 Turbo as...read full article