"What’s got 540 hp, rides on optional 18-inch Cooper RS3 tires, and can do the ¼ mile in 11.8-seconds at 121 mph? The correct answer is Jack Roush’s new 2010 ROUSH 540RH Mustang.
"Designed as a true 'sleeper' car, this visually toned down pony is based on the 2010 Ford Mustang GT. Aside from its ROUSH rear decklid spoiler in the back and subtle tone-on-tone striping package, the car is all business."
Read the full story: A Wolf in Sheep's Clothing (About.com)