Mustang Boss® 302 Laguna Seca

The 2012 Mustang Boss® 302 with Laguna Seca Package* adds elements like race-compound tires, an aggressive front air splitter and rear pedestal spoiler, standard 

Torsen differential and Recaro® seats, additional track gauges, and even deletes the rear seat and adds a rear cross-brace to save weight and add torsional rigidity.

*Front air splitter included in Laguna Seca Package is intended for race track use only and is not legal for on-street driving. May degrade crash performance and void vehicle warranty. Must be installed by customer.

2013 Mercedes-Benz SLS AMG GT

Relative supercar newbie Mercedes seems to have adopted a similar philosophy, which likely explains why the 2013 Mercedes-Benz SLS AMG GT has emerged just two years after the standard car exploded onto the scene. Essentially a faster and more driver-focused version, it will be sold alongside the standard SLS (and from next year, the 650 horsepower SLS Black Series) in Europe and other markets around the world.

 Here in the U.S. it will replace the standard car altogether, which makes sense, as the overwhelming majority would go for the GT anyway.

  If you're currently scanning the pictures looking for a wild new rear wing or jutting chin spoiler, you'll be sorely disappointed. Visual changes on the outside amount to headlamps and taillights with darkened glass, red brake calipers, and a GT badge next to the AMG logo on the trunklid. Hardly remarkable, but in keeping with the subtle evolution vibe. Release the gullwing doors on the Coupe, or swing open the conventional doors on the Roadster version, and it's more of the same inside. Added extras include red seatbelts, red stitching on the wheel and dash, and the option of quilted leather on the seats, but then the SLS never really needed any help getting noticed.

Lamborghini Aventador Lp700 4 Roadster

European pricing for the 2013 Lamborghini Aventador LP700-4 Roadster was released when the model was officially introduced early this week, but we had to wait a few extra days to see how much customers over here should expect to pay for the topless supercar. Now, Lamborghini has announced that US-bound versions of its new roadster will run $441,600, which doesn't include the $3,700 gas-guzzler tax, meaning the Aventador Roadster will wear a base MSRP of at least $445,300.

As a refresher, this new roadster is a topless version of the 700-horsepower, all-wheel-drive Aventador, and it features a two-piece removable top made of carbon fiber (each weighing in at around 13 pounds) that can be stored in the front trunk. Performance figures include a 0-60 time of under three seconds and a top speed of 217 miles per hour. Lamborghini is currently taking orders for the Aventador Roadster with the car set to go on sale next summer.

Peugeot's Onyx

Though the French automaker is clearly on the top of its game with all of its offerings for the 2012 Paris Motor Show, Peugeot's Onyx concept is its definitive highlight.

A masterpiece in matte black paint, Onyx's most striking features are the two huge swathes of polished copper that adorn both sides. Each side is made from a single piece of copper and, other than extensive polishing, the material is unprotected from the elements. The goal here, says Peugeot, is that the copper panels will change and evolve over time with oxidation.

The lightweight concept car – all of the body panels are made from carbon fiber and the car weighs just 1,100 kilograms (2,425 pounds) – is propelled by an aggressive hybrid powertrain. At the heart of the propulsion is a 3.7-liter V8 that's good for a whopping 600 horsepower, and it's modulated via a six-speed sequential gearbox. The conventional engine is augmented with lithium-ion battery-powered electric system that adds another 80 horses to the mix.

Camaro Based Firebreather

Pontiac is dead, but that hasn't stopped Classic Design Concepts from selling a modern-day Firebird.

Dubbed the Firebreather, the car is based on the Chevrolet Camaro and features a unique front fascia, new headlights (with LED halos), a revised hood, side sill extensions, and a modified rear bumper with an integrated diffuser. Other styling tweaks include new taillights, a rear spoiler, and 20-inch wheels outfitted with Pirelli P-Zero tires.

Inside, the cabin boasts leather upholstery, piano black trim, red ambient lighting, special floor mats, and an individually numbered plaque.

Power is provided by a supercharged 6.2-liter V8 engine with a cold-air induction system and a 3-inch cat-back dual exhaust. It produces 599 hp (447 kW / 607 PS) instead of the standard 426 hp (318 kW / 432 PS).

Firebreather production will be limited to 50 units and pricing starts at $60,000.