K&n E-2553 Replacement Air Filter on 2040-parts.com

Porsche 918 Spyder caught high-altitude testing

The Porsche 918 Spyder first broke cover as a concept at the 2010 Geneva motor show. Since then, we've seen it again and again at various auto shows and track events. Now it's testing at high altitudes in Keystone, Colo.

AutoWeek Best of the Best 2011: Cadillac CTS-V Coupe, Jeep Grand Cherokee

Several decades have passed since we handed out an award whereby AutoWeek editors picked the best new vehicles in a given model year. We've dabbled in things such as "America's Best," when we've asked you--our faithful, opinionated and knowledgeable followers--to vote on the best vehicle in certain categories. We drive hundreds of vehicles each year (including all of the newest hardware), report the cold, hard facts and give you our opinions about which vehicles are worth your consideration when the time comes to make one of life's biggest purchases.

GreenGT H2 completes first laps ahead of 2013 Le Mans

Are we entering the era of the eco-friendly racing car? French outfit GreenGT could be spearheading the push, with the announcement its new H2 hydrogen racing car has completed its first successful racing laps testing at the Magny-Cours circuit in France. The wacky-looking hydrogen hybrid racing car will compete in the 2013 Le Mans 24 Hours endurance race, filling the ‘experimental competitor’ pit garage vacated by the radical-looking 2012 Nissan DeltaWing.