Audi A1 quattro by ABT

German tuner ABT has decided to take a look at the limited-run Audi A1 quattro and see if they can make it even more impressive. While the standard model pumps out 256 HP (188 kW) from the 4-cylinder 2.0-liter turbocharged engine, this tuned version unleashes 307 HP (226 kW). The torque figure is also up from the standard 258 lb-ft (350 Nm) to 295 lb-ft (400 Nm) between 2,500 rpm and 5,000 rpm. As a consequence to this power hike, the A1 quattro is capable of doing the 0-62 mph (0-100 km/h) sprint in 5.4 seconds, making it 0.3 seconds quicker than the stock model. According to ABT, this power boost does not have an impact on the pocket rocket’s fuel consumption and exhaust emissions.

2013 Shelby GT500 Super Snake

Shelby American has unveiled their Super Snake package for the 2013 Ford Mustang GT500. Set to be showcased at the Barrett-Jackson collector car auction in Las Vegas, the car features a fiberglass hood, a Borla exhaust and 20-inch alloy wheels with high-performance tires. There's also a sport-tuned suspension, Wilwood brakes and an upgraded cooling system. The model can also be equipped with an optional 13-inch wide rear tire and wheel package which was featured on the Carroll Shelby Tribute car that debuted at the Pebble Beach Concours d'Elegance. Interior changes are limited but include embroidered headrests and floor mats as well as other "Shelby-designed components." The entry-level model has a supercharged 5.8-liter V8 engine that develops 662 hp (494 kW / 671 PS) and 631 lb-ft (855 Nm) of torque. If that's not powerful enough, the engine can be equipped with a Whipple or Kenne Bell supercharger that enables it to produce a staggering 850 hp (634 kW / 862 PS). Production will be limited to 500 units and pricing starts at $28,995 for the entry-level package. Moving up to the high-performance variant costs a wallet busting $39,995.

Lamborghini Aventador LP900 by DMC

Revealed for the first time back in March, the Lamborghini Aventador LP900 Molto Veloce by DMC brings not only visual changes to the Italian supercar but also a healthy power boost from the regular 700 HP (514 kW) to 900 HP (660 kW). On the design front, we notice the new look of the front spoiler and splitter lip that are mounted on the stock bumper and are manufactured from carbon fiber. The aerodynamic stability has been improved thanks to the new side skirts which DMC says that they act as diffusers. In addition, downforce has also been further improved by the carbon fiber rear diffuser and the added tunnel system, along with the rear wing spoiler. The changes do not end here as the engineers at DMC have decided to replace the overhead throttle valves with 12 custom single-intake throttle plates (one for each cylinder). The pressure modulators, injection nozzles, fuel lines and fuel pumps are some of the components that have been replaced by the tuner. While the stock exhaust system of the Lamborghini Aventador tips the scales at 34 kg, the new one weighs only 3.4 kg. The price tag for all these upgrades is 125,000 Euros (approximately $165,000). All parts are already on sale.