Do you know which is the most powerful road legal factory production muscle car ever produced? Now it’s official that this place is taken by the Dogde Challenger SRT Hellcat with its supercharged 6.2 litter HEMI Hellcat engine, which produces an unprecedented 707 horsepower and 650 lb-ft of torque. Apart this, its the most powerful Dogde and Challenger ever made, eclipsing the 662 hp of the supercharged 2013 Ford Mustang GT500. And it’s even better that its elder brother, the Viper. Check out the pics of this amazing racing car.