Volkswagen Genuine Air Cleaner Buffer 036129689b on 2040-parts.com

Autoweek in review: What you might have missed

Mercedes-Benz will offer its flagship SLS AMG as the 2013 SLS AMG GT late this year. It will get a boost in horsepower and a refreshing for the upcoming model year. The SRT Viper was caught on the streets of metro Detroit.

Chevrolet Camaro ZL1 hits the wind tunnel, gains downforce: Video

We've seen the gaudy output numbers of the 2012 Chevrolet Camaro ZL1: 580 hp and 556 lb-ft of torque make it the fastest Camaro ever produced--by a long shot. We've seen it at the Nordschleife dropping a supercar-like time of 7 minutes, 41.27 seconds around the 13-mile, 170-turn track. Now it's time to learn a little bit about what it takes to stabilize such a powerful beast at speed.

Alfa Romeo 4C convertible likely for 2015

Conventional wisdom holds that if you want to take on Porsche's 911, you need a convertible variant. And although Alfa Romeo's often marched to the beat of a wonderfully idiosyncratic drummer, it sounds as if it's hewing to general sporting-car rules of thumb with the 4C. According to a report in Britain's Autocar, sources have confirmed that a 4C convertible will follow the launch of the coupe by about a year.