2007 Jeep Liberty Sport Utility 4-door 3.7l on 2040-cars

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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.

NHTSA still mulling crash tests for recalled Jeeps

Well, no one should ever accuse the government of not giving things plenty of thought. The National Highway Traffic Safety Administration is still debating whether it will retest any of the 1.56 million 1992 to 1998 Grand Cherokees and 2002 to 2007 Libertys that were part of a recall regarding fires after rear-end collisions. And yes, this debate has been going on for over a month. In other news...
The recall dustup started in early June, when Chrysler took the unusual position of refusing a recall request from NHTSA regarding placement of the fuel tank on the effected vehicles. NHTSA said a collision could cause a fire, a position Chrysler took issue with. Extensive negotiations ensued, with Chrysler agreeing to fit certain Jeeps with trailer hitches, which it said would provide some protection to fuel tanks mounted behind the rear axle in the event of a collision.
Part of the issue rests with the amount of data that needs to be processed, according to The Detroit News. NHTSA administrator David Strickland said during a Washington Auto Press Association meeting, "There's a lot of data and Chrysler is being very cooperative in giving us more data." Until that information has been sorted, it looks like re-testing will still be up for debate.

Chrysler readying 20 Moparized vehicles for SEMA

The Las Vegas Convention Center has plenty of space for aftermarket companies and automakers to show off their wares, and it looks like Chrysler is taking advantage of the spacious floor plan. At next month's SEMA Show, Chrysler will have a full 20 cars from its six brands decked out with Mopar gear.
As a hint of what is to come, Chrysler released a handful of teaser sketches showing glimpses of modified Jeep Cherokee, Ram 1500, Fiat 500L and Chrysler 300 concept vehicles. The automaker will also use the venue to show off a new line of Jeep Performance Parts offered by the all-new Mopar Off-Road Division. In addition to the images, Chrysler also issued a brief press release - posted below - breaking down some of the "industry-first features" that Mopar has offered in recent years.