Since man first invented the car for transportation, there has always been someone wanting to go faster and get there first. Back in 1964, car manufactures started selling high performance cars as a daily street driver, but you could also race them at the track on the weekend, creating the concept of "What wins on Sunday, sells on Monday". Every year high end performance cars were going faster, until the US oil crisis started in 1971 killing the American Muscle care forever, or so we thought. Since then the car manufacturers have been trying to satisfy the government's demand for better fuel economy, while also satisfying the customer's need for performance. To help find a solution to satisfy the customer, a high performance group of engineers within Chrysler developed the Street & Racing Technology (SRT) program. The first Hemi-powered SRT8 vehicles came out in 2006, (Charger, Magnum, 300 and Grand Cherokee) they were fitted with the 425hp 6.1L Hemi. Then when the retro 2-door Dodge Challenger SRT8 was released in 2008, the car manufacturer muscle car wars started again! in 2011, the SRT8 models would get the new 6.4L Hemi producing 470 horsepower. Then in 2015, the SRT team turned the muscle community upside down, unveiling the most powerful Hemi engine ever, a 6.2L Supercharged Hellcat Hemi rated at 707hp with 650 of torque! By mating this monster engine to the new 8-speed automatic transmission it made the Dodge Challenger and Charger SRT Hellcats one of the most powerful and quickest production Muscle Car and 4-dr Sedan in the world!