A large group of SRT cars was recently spotted out testing, including several Challengers prototypes with front bras hiding a revised front fascia for a lower air intake, plus different exhaust. These Challengers are most likely equipped with the new supercharged 6.2-liter “Hellcat” Hemi V8 which will help Mopar compete with the Camaro Z/28 and Mustang GT500. Power is predicted to be in the 600 horsepower range. The Hellcat Challengers are expected in 2014 as a 2015 model. See all the pics at Allpar