The Hennessey Jeep Grand Cherokee HPE800 ($235,000) takes Jeep's top-of-the-line SUV and turns it into a veritable speed demon by expanding the factory Hemi V8 from 6.4 to 7.0 L and adding in a twin-turbo forced induction system to achieve 805 hp and a 0-60 time of 3.1 seconds. Of course, all that power isn't useful if you can't harness it, which is why it also boasts an upgraded transmission system, 15.1-inch Brembo brakes in the front and rear, and a lowered, more sporty suspension, and to make sure no one mistakes it for the "regular" version, it also packs lighter alloy wheels, a carbon fiber front end, and a custom leather interior with an Alcantara steering wheel. It'll arrive in 24 well-appointed garages next year.