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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 Renegade configurator switches on

Less than a week after letting loose with pricing information for its 2015 Renegade, Jeep has powered up the configurator for its new compact CUV, giving us our first complete look at pricing for the model's healthy options catalog. If you've messed around with any of FCA's other online configurators, the Renegade's will be immediately familiar. Pick a trim, interior and exterior color, optional extras and packages, and you're done. Of course, we don't write these posts just to let you know about a configurator going live. We do them because it gives us an excuse to mess about with all the different varieties of a new model, and, on occasion, to build something surprisingly expensive or cheap, just to see if it can be done. The Renegade certainly has no issues when it comes to the former. If you want the priciest model, you'll need the $25,995 Trailhawk, which can be priced up to $33,330. We got to that figure by adding the $1,495 Trailhawk Premium Group (heated, powered leather seats, dual-zone climate control, heated steering wheel, 40/20/40 split-rear seats), the $595 Safety and Security Group I (blind-spot monitoring with cross-traffic assist and an alarm), the $395 Trailer Tow Group, the $1,395 powered MySky system, a $150 hood decal (which might mean that you can get a Trailhawk without a black stripe), a $1,295 navigation system with satellite radio, a $495 nine-speaker stereo, a $295 push-button starter, a $200 remote starter and a $75 tonneau cover. Will you need all of those options? Not really. But many of them would certainly fall into the "must-have" category for customers. Head over to Jeep's consumer page and mess about with the configurator, and let us know what you think of the full pricing (and what your ideal spec looks like!) in Comments. Related Video:

Jeep Begins Fixing 1.56 Million Recalled Grand Cherokee, Liberty SUVs

Chrysler is just now beginning the big job of fixing 1.56 million older Jeep SUVs seven months after a recall was announced, according to The Detroit News. Jeep Grand Cherokees sold between 1992 and 1998 and Jeep Liberty models sold between 2002 and 2007 are being recalled because the gas tank can leak in the event of a rear-end collision, leading to a fire. The National Highway Traffic Safety Administration originally requested the recall of 2.7 million vehicles. Chrysler initially disputed NHTSA's findings and seemed willing to go through a court battle until an 11th-hour deal reduced the number of vehicles involved in the recall. The remaining vehicle owners left out of the recall will receive a "customer service action" notification and may not get fixed. Chrysler says the vehicles are safe and need no repairs. Fixing the 1.56 million Jeeps will cost Chrysler $151 million. NHTSA cited 51 deaths causes by such tank fires. Chrysler plans to install protective trailer hitches to protect the gas tanks, but even the automaker admits the hitches will only provide incremental protection in a low-to-moderate speed rear-end crash. Related Gallery 2014 Jeep Cherokee Test Drive View 9 Photos Recalls Chrysler Jeep jeep liberty