Jaguar has unveiled the 2014 XKR-S GT – a suped-up version of the original XKR-S developed by the Jaguar ETO division of specialty vehicle production. Featuring a supercharged 5.0 liter V8 – boasting 550 hp and 502 lb-ft of torque – and six-speed automatic transmission. Carbon fiber are used on the front air splitter, dive planes, and…