The introduction of the new Chevy Camaro and the celebration of the 50th anniversary the Ford Mustang hasn't hurt FCA’s muscle cars – Dodge Challenger and Charger Hellcats and the Viper. Sales are so strong that FCA U.S., formerly Chrysler Group, capped orders for the hot-selling 707-horsepower Hellcat models. Dodge and SRT received more than 4,500 orders for the new 2015 Dodge Challenger SRT Hellcat in just the first five days after orders opened in September.