The Hennessey-prepped Jeep Grand Cherokee SRT600 is once again in the center of attention of the Bulgarian design firm Vilner. Back in October 2010, the company had launched its first take on the Hennessey Grand Cherokee SRT600 that packs a modified V8 engine fitted with a "Vortech" turbo system for an output of 600-horses.

For its second go on the Jeep, Vilner completely revamped the interior with red and black Alcantara combined with black leather trimmed in red seams. The company says it also designed a new flat-bottom steering wheel with its shape customized to fit the owner's personal preferences.

Hennessey is one of America’s best-known tuning houses offering solutions for a great number of vehicles ranging from Nissan GT-R bashing Caddy Escalades to Ferrari’s 458 Italia –and anything in between.

Having already tuned the sedan and estate versions of the Cadillac CTS-V, Hennessey decided it was time to give a little attention to the coupe version: hence the V1000 CTS-V Coupe was born.

There’s nothing faster, short of a Formula 1 car, than a Bugatti Veyron, right? In particular, a Bugatti Veyron Super Sport boasting a 1,200HP quad-turbocharged 16-cylinder engine, four-wheel drive tech and a 258 mph (415 km/h) top speed. Whoever is behind its wheel must feel invincible, right?

Well, actually, no. A few days ago, at the Goodwood Festival of Speed, a Veyron Super Sport that was ready to begin its climb up the hill pulled over and let another car start first. What car was that?

American tuning firm Hennessey has crafted some pretty insane vehicles over the years. One of its most recent tunes is based on the Cadillac CTS-V Sport Wagon, which leaves GM’s factory with a 556-horsepower 6.2-liter V8 lump, but once Hennessey’s engineers perform their magic under the hood, output is lifted to 650 horsepower.

To show off the tuned CTS-V Sport Wagon’s potential, the Texas-based company brought the Cadillac to the track and drag raced it first against a stock 480HP Porsche 911 Turbo [997] and then a standard 485HP 2011 Nissan GT-R. Watch what happened in the video after the jump.

American tuning firm Hennessey has crafted some pretty insane vehicles over the years. One of its most recent tunes is based on the Cadillac CTS-V Sport Wagon, which leaves GM’s factory with a 556-horsepower 6.2-liter V8 lump, but once Hennessey’s engineers perform their magic under the hood, output is lifted to 650 horsepower.

To show off the tuned CTS-V Sport Wagon’s potential, the Texas-based company brought the Cadillac to the track and drag raced it first against a stock 480HP Porsche 911 Turbo [997] and then a standard 485HP 2011 Nissan GT-R. Watch what happened in the video after the jump.