The Mustang created the "pony car" class of American automobiles—sports car-like coupes with long hoods and short rear decks—and gave rise to competitors such as the Chevrolet Camaro, and Pontiac Firebird, AMC Javelin, as well as Chrysler's revamped Plymouth Barracuda and the first generation Dodge Challenger. The Mustang is also credited for inspiring the designs of coupés such as the Toyota Celica and Ford Capri, which were imported to the United States.
The Shelby is a higher performance variant of the Ford Mustang which was built by Shelby American from 1965 to 1967, and Shelby Automotive from 1968 to 1970. Following the introduction of the fifth generation Ford Mustang, the Shelby nameplate was revived in 2007 for new high performance versions of the Mustang.
The 2013 models have various improvements and differences compared to the GT500 of 2012 including new front end sheet metal along with standard HID headlamps, along with a new LED tail light assembly. The new 2013 Shelby GT500 also has no grill, due to the massive amount of cooling required for the vehicle. Performance changes include twin fuel pumps (a Mustang GT’s single supply pump, twice over), larger fuel injectors, a grippier and larger-diameter clutch, a larger fan, a three-row intercooler (the previous car used a double-row unit), a beefed-up Tremec 6060 six-speed with an internal oil pump, and a single-piece carbon-fiber driveshaft. Larger Brembo front disc brakes with six-piston calipers, reinforced axle tubes, and aero tweaks to help the car reach 200+mph safely. Ford says the changes have resulted in a 14-percent reduction in drag and a 66-percent increase in front-end downforce. Also new for 2013 is a larger front anti-roll bar and retuned springs. An rpm-adjustable electronic launch-control function is standard, as is four-mode electronic stability control.
A Performance package is also offered, adding two-mode adjustable Bilstein dampers and a Torsen limited-slip rear differential. In addition to the Performance package, a Track package for road racing can be ordered bringing a transmission cooler, a nose-mounted differential cooler for the Torsen limited-slip unit, and an air-to-oil engine-oil cooler. Wilwood disc brakes was also brought on board with an improved stopping package.
A Motor Trend magazine May 2012 road test provided a 0-60 time of 3.5 seconds and a quarter mile time of 11.6 seconds at over 125 miles per hour (201 km/h). By comparison the '13 GT500 is faster than both the Camaro ZL1 and Corvette Z06.
Automobile-Catalog computer model estimates provided a 0-60 time of 3.3 seconds, a quarter mile time of 11.3 seconds at 130 miles per hour (210 km/h), and a top speed of 212 miles per hour (341 km/h).
In February 2012, at the Chicago Auto Show, Shelby officially announced that a convertible version of the 2013 GT500 will reach production. The convertible has a limited top speed of 155 miles per hour (249 km/h).
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