Ever since there have been Vipers, John Hennessey has been tuning them. Sometimes, it seems like his tuned cars are on the street before the production cars, if that's at all possible. And they were always incredibly bonkers.

So you want a Lamborghini Murcielago, but you think it's a bit too tame, safe and common. Well, have we got the solution for you!

John Hennessey has already challenged Bugatti to a duel with his animalistic 1,226 hp Cadillac CTS-V coupé. Now he's testing the limited run cars on at Ellington Field in Houston, Texas.

Mercedes has a problem. The 2013 Mercedes-Benz SL is a volume tourer for the brand, but when someone becomes aware the SLS AMG exists they suddenly find it hard to find the SL interesting.

The Subaru BRZ and Scion FR-S twins are some of the most exciting cars for enthusiasts to hit the roads since the original Mazda Miata made it's debut. But one thing was missing from the equation.

John Hennessey, the Texan who loves to twin turbocharge everything from trucks to custom-built Lotuses, has built a 1,226 horsepower Cadillac CTS-V Coupe. He thinks his operation can outdo the multimillion dollar might that is Bugatti.

Legendary wine critic Robert Parker was so enthused when he first tasted the 1985 Sassicaia, that he awarded the vintage a maximum 100-points on his internationally acclaimed ratings system, such was the "surreal" quality of this fabled wine.

Car companies are unbelievably conservative, especially in their styling. That's why we have tuner companies to spice things up a bit. They don't always make things better, though.

Car enthusiasts love stripped-out, factory-built "race cars for the road." What happens when someone turns one back into a racecar?

If you've ever been Waterfest or H20 — the big VAG-togethers for VW/Audi fans — you know how rabid tuning shop APR's fanbase is. The Alabama-based outfit has been responsible for some major-league hardware and software upgrades.

Mansory, the tuning house with a penchant for ruining nearly everything it touches, may have finally made something cool that doesn't burn out people's retinas. The car, called the Carbonado, is a carbon fiber Lamborghini Aventador that will be limited to a production run of just six units.

Many people need a release from the mundane reality of everyday life. Some enjoy a picnic by the lake. Others escape for a round of golf. Then there are those who take it to the extreme. They enjoy hurling themselves out of an aircraft, with a flimsy-strapped backpack attached to their shoulders. Or risk life and limb…

We love the RUF CTR Yellowbird and the infamous video that goes with it. We were therefore pleased to see Jethro Bovingdon not break it in a drive around Germany. What a gem.

The Ronin Exige, aka the self-proclaimed 'World's Fastest Lotus', is a supercharged and turbocharged 680-horsepower monster. But yesterday morning it was put into the wall of California's 101. Now the owner claims it wasn't his fault — or the car's.

It's got a two-stage fueling system comprising rocket fuel and Spaceballs-grade liquid Schwartz. It's been widened by nine inches and lightened to achieve the power-to-weight ratio of a '70s-era Formula One car. It's also got a Group B-inspired twin-charging system that produces quadruple-digit horsepower. It just…

It's been almost two years since we featured an E85-fueled Nissan GT-R from Switzer. Since then, the Ohio-based tuner has been steadily improving their cornfed-Godzilla conversion package to the tune of a nearly 25% power jump.

A thread on StanceWorks — the popular forum for lowered and hellaflush cars — began with a proud 2001 Honda Civic owner showing off his trunk-rattling sound system and slammed car. Then forum members quickly discovered how he lowered the car. As you can see, it's the kind of horrific DIY engineering that makes you want …

Porsche's venerable 911 is lust-worthy on its own, but that hasn't stopped many an tuner from attempting to eke out even more of what the car has to offer. Today's Nice Price or Crack Pipe 1986 Carrera coupe has been RUF'd up, but is its price too RUF to handle?

Has John Hennessey ever found a fast car he didn't think he could make faster? His next target is the McLaren MP4-12C, which he's planning to turn the power dial up to a stonkin' 800 hp. Better reach for the fireproof suits, boys, because the flames are comin' this way!

Apparently you can make enough money selling WoWBots to buy a tuned, carbon-fiber-laden Nissan GT-R for $150,000. That's what one 18-year-old Zilvia.net forum denizen says he did, and now he's selling the car on the board. Naturally, everyone else thinks he's trolling.