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[/IMG]Proof of Hennessey Challenger SRT600 Turbo's punch: 11.9 sec @ 121 mph[IMG]

Click above for more high-res shots of the Hennessey SRT600

Hennessey Performance is apparently excited that the Dodge Challenger is finally here. They now offer a myriad of performance upgrades for the Challenger SRT8 including naturally aspirated versions of Chrysler's 6.1L VEMI V8 that increase power up to 575 horsepower, as well as supercharged and turbo versions producing up to 725 hp. There's clearly a power upgrade for everyone, but the most impressive appears to be the Challenger HPE600 Turbo, also known as the SRT600, which Hennessey reports has ripped off a quarter mile time of 11.9 seconds at 121 mph. The company called the car's launch during the run "conservative", though it was wearing optional Nitto Drag Radial tires at the time.

Of course, any big bump in power should be accompanied by equal improvements to the suspension and brakes, and Hennessey will also fit your car with a KW adjustable coil-over suspension, larger anti-roll bars, new bushings and unique StopTech brakes. The cost of a complete Challenger HPE600 Turbo package (including Hennessey embroidered floor mats but not the cost of the donor car, of course) is $74,950, though one can opt for just the engine upgrades and be liberated of only $29,500. In total you could be spending well north of $100,000 on a 725-hp Challenger if you find Hennessey's approach appealing, but look at this way, you'd probably be the only one.

Check out high-res pics of the Hennessey Challenger HPE600 Turbo in the gallery below and video of its quarter-mile run after the jump.