HennesseyPerformance

The Nissan GT-R V Spec will allegedly be packing 520 horses when it arrives some time next year. That still won't be enough for a lot of people (especially folks who want to win seriously competitive drag races), so Hennessey is offering GT-R upgrades that beef Godzilla up to 600 hp. The seven mods in the kit don't do anything crazy to the car -- items like stainless steel turbo downpipes and a wastegate actuator upgrade -- they simply combine to add 120 hp to the corral already on hand. As far as we're concerned, we'd take that over a 520 hp V Spec any day... we can rip out the rear seats ourselves.

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.

Click above for high-res gallery of the 2008 Dodge Challenger SRT8