The GT500KR -- KR stands for "King of the Road" -- is the most powerful Shelby-massaged Mustang yet. Ford will build just 1,000 of the new GT500KRs, which are powered by a 540 hp supercharged version of the 5.4 liter V8.
2008 Ford Shelby GT500KR New and redesigned 2008 cars
From Aaron Gold, About.com
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