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Watch this 650-hp Hennessey Jeep Grand Cherokee go from 0-60 in 3.9 seconds

Hennessey Performance Engineering has created an HPE650 package for the Jeep Grand Cherokee SRT fitted with the 6.4-liter Hemi engine. When it leaves the showroom floor it has 470 horsepower and gets from 0-60 miles per hour in 4.8 seconds. When it leaves Hennessey's garage floor after the upgrade it has 650 horsepower - 530 hp at the wheels, according to Hennessey - and gets to 60 mph in 3.9 seconds on its way to running the quarter-mile in 12.6 seconds.
There's more than just a Roots-type supercharger bolt-on, with ported cylinder heads and high-flow headers among the many changes made to the engine. You can watch this pre-2014 facelift silver model prove its spec sheet on the drag strip in the video below.

Jeep gives a trio of customs an encore showing at SEMA

While Jeep certainly had some new customs on display at this year's SEMA show, it wasn't afraid to recycle a few that people might have missed from earlier this year. The maker of many beloved off-roaders already displayed the Jeep Cherokee Dakar, Maximum Performance Wrangler and Wrangler Mojo at the 2014 Easter Safari, but they all made it to SEMA for an encore.
Based around the Trailhawk, the Cherokee Dakar (pictured above) imagines an even more off-road-capable version of the crossover. The concept wears a mix of Silver Steel Stain paint with Flame Red graphics and rides on 17-inch wheels wrapped in 33-inch BFGoodrich Mud Terrain tires. To back up the rugged look, the Dakar is fitted with rock rails and skid plates protecting the oil pan, front suspension, fuel tank and other underbody parts. It also sports prototype parts from Jeep Performance Parts, including a lift kit and fender flares.
The Wrangler is one of the paragons of off-roading, and as the name suggests, the Maximum Performance Wrangler concept is meant to be the ultimate example of what it can do. The custom features locking Dana 60 axles front and rear, a 4:1 Rock-Trac transfer case, prototype 4-inch lift kit and 37-inch Mud Terrain tires over beadlock wheels. To stay on the trails well into the night, a bar of LEDs is mounted above the windshield. And finally, the Mopar Blue exterior kind of makes the vehicle look like the world's toughest blueberry.

2014 Jeep Cherokee gets official in a hurry

Automakers work very, very hard to keep their new vehicles under wraps until they can present them in exactly the way they want it - typically choreographed under the bright lights of an auto show, or perhaps with photos or video in an idyllic location. Spy shooters and leaks, in other words, keep executives and public-relations types up at night.
This is likely to be one of the most polarizing designs to come out in 2014.
Take today, for instance, when the team over at Jalopnik got a big scoop - the first undisguised shots of the 2014 Jeep Cherokee, a model whose name wasn't even officially confirmed yet. The clandestine images taken inside of a factory were blurry and didn't exactly show off the crossover's radical new contours in the same sort of flattering light that Jeep probably would've wished for its product reveal. So the Auburn Hills automaker has wisely reacted by spilling at least some of the beans on the new model, giving us these four photos and confirming the Liberty replacement's name, Cherokee.