The all-new 2015 Dodge Challenger SRT with 600-plus horsepower HEMI Hellcat engine delivers unrivaled performance, race-inspired interior and new technologies geared toward the driving enthusiast. The Challenger SRT Hellcat features the all-new supercharged 6.2-liter HEMI—the most powerful V-8 engine Chrysler has ever produced. The V-8 engine can be mated with an upgraded six-speed manual transmission or a new TorqueFlite eight-speed automatic. The Hellcat also features new Pirelli tire technology with class-exclusive standard Y-Plus-rated four-season tires to help handle extreme loads. The all-new, driver-focused cockpit is designed for true performance enthusiasts with stunning style, premium materials, world-class craftsmanship and state-of-the-art technology. For the first time, the Dodge Challenger SRT Hellcat comes standard with two key fobs—red and black. The red key fob is the only key that can unlock the full horsepower and torque potential of the Challenger SRT Hellcat engine; while the black key fob limits the driver to a reduced engine output.