Inside the 'most powerful muscle car' ever made

707 horses under there?

2015 dodge challenger srt hellcat

All that power comes from Chrysler Group's first factory-supercharged Hemi V8 engine. Because owners might not want to trust just anyone with 707 horsepower, the SRT Hellcat will come with two key separate "keyless ignition" key fobs to start the car.

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A red key fob will enable the driver to use the Hellcat's full power potential while drivers given the black key fob will be able to unleash "only" 500 horsepower.

First published August 6, 2014: 2:47 PM ET