Not two months after unveiling the restyled 2010 Mustang, Ford pulled the wraps off the latest version of its Shelby GT500 super-'Stang. As if the previous version's 500 horsepower wasn't enough, these new GT500 coupes and convertibles pack a projected 540 pavement-ripping ponies from their supercharged and intercooled 5.4-liter V8, while delivering about two more miles per gallon on the highway. Peak torque has increased from 480 to 510 lb.-ft. and the rear-axle's standard ratio increased from 3.31:1 to 3.55:1, promising truly scary acceleration. Outside, the reworked heetmetal is augmented with a new functional extractor to vent under-hood heat and a "Gurney Flap" rear spoiler. Ford's Special Vehicle Team (SVT) says it used the 40th anniversary Shelby GT500KR "King of the Road" Mustangs as its performance starting point and built from there.