Dodge has officially unveiled its new Challenger SRT Hellcat, the most powerful Challenger to date from the automaker. Powered by a 6.2L Hemi V8, the Hellcat will be have over 600 horsepower at its disposal. The car will come with a number of driving modes best suited for different surfaces and situations, and power will be channeled through either a six-speed manual gearbox or eight-speed automatic gearbox. Interestingly enough, the car will come with two sets of keys: a red key that unlocks the full power of the car and a black key that only unlocks some of the 600+ horses. Externally, the car boasts a number of modifications including a hood scoop, aerodynamic package, and a vertical-split grille. Expect the Hellcat to be available towards the end of this year.