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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.

The List: Best of proving grounds

Proving grounds are where automakers and enthusiasts alike go to push their vehicles to their mechanical limits. The Rubicon Trail, located in the Sierra Nevada, is the ultimate off-road test, while Germany's Nurburgring is a grueling 13 mile road and track course. Jessi and Patrick visit both iconic proving grounds in this "best of" compilation of The List. If you like what you see, stay tuned to watch the full episodes, or click here to go directly to our episode archive and pick out some of your own favorite moments of The List to revisit. The List #0004: Conquer the Rubicon Trail The List #0073: Drive the Nurburgring Have an RSS feed? Click here to add The List. Click here to subscribe to The List in iTunes. Click here to learn more about our hosts, Jessi and Patrick. BMW Jeep Off-Road Vehicles Racing Vehicles The List Videos Original Video

Jeep Wrangler production in Toledo to nearly double by 2018

The Jeep Wrangler's future in Toledo, OH, is officially secure. FCA US announced plans on Thursday to spend $1.05 billion to retool the Wrangler factory and another site in Illinois to build Jeeps. The investment could add up to 1,000 jobs, and, according to The Detroit Free Press, allow Jeep to build as many as 450,000 Wrangler models in Toledo. FCA is investing $700 million to make over the Toledo North factory to build the next-generation Wrangler – a vehicle that's hotly anticipated by enthusiasts. FCA said this will add about 700 new jobs. The Wrangler factory is part of a multi-site complex in Ohio, and FCA said an announcement about the South factory will come later. Nearly two years ago, FCA chief executive Sergio Marchionne touched off a firestorm by suggesting the Wrangler could leave Toledo, though plans to keep the iconic Jeep there quickly proceeded. Automotive News reports the new Wrangler will use some aluminum elements, run a turbo four-cylinder engine, and offer a diesel variant. Designers will also pay increased attention to aerodynamics, though maintain the Wrangler's familiar appearance. Additionally, FCA reportedly plans to build a Wrangler pickup in Toledo. That 450,000-vehicle threshold could potentially break down into 350,000 traditional Wrangler models, along with another 100,000 Wrangler-based pickup trucks. When the current Toledo plant was opened in 2005, Chrysler said its capacity was about 150,000 vehicles per year. Since then, that figure has increased to about 240,000 Wranglers yearly, and Jeep has no problem selling that many. FCA's factory in Belvidere, IL, gets $350 million for upgrades to produce the Jeep Cherokee, which moves there in 2017 from Toledo as part of a product shuffle. FCA builds the Dodge Dart and Jeep's Patriot and Compass in Belvidere. The automaker is killing the Dart and will replace the compact Jeeps with a single model next year. The moves are part of FCA's strategy to fortify the Jeep brand, which has posted healthy sales and enjoys a strong reputation around the world. Related Video: