Magnaflow Pro Series Turbo-back Stainless Ford F250 F350 Super Duty 7.3l Diesel on 2040-parts.com

BMW Vision EfficientDynamics

BMW has revealed a radical new concept set to be unveiled at the forthcoming Frankfurt motor show. Dubbed Vision EfficientDynamics, the vehicle is a showcase for the German automaker's new lightweight technologies and material adaptations. The prototype features a series of layered, flowing design elements which come together to create a lightweight vision for the future: a performance-oriented model created to not only conjure up emotion but to also epitomize BMW's 'EfficientDynamics' technologies.

For new CAFE rules, automakers place high-stakes tech bets

Game-changing 2015 fuel economy rules are forcing vehicle development teams to make high-stakes bets on expensive technologies--bets that will separate the winners from the also-rans. Not only do federal rules target a 2015 fleet average of 35.5 mpg, up from the current 27.5 mpg for cars and 23.1 mpg for light trucks; they force automakers to bet on different technology packages for each vehicle segment. Companies that do best at mixing technologies while keeping down costs will have an advantage when buyers wince at higher stickers.

One lap of the Web: A Ferrari F40, Sebastian Vettel and random acts of 'squandering'

We spend a lot of time on the Internet -- pretty much whenever we're not driving, writing about or working on cars. Since there's more out there than we'd ever be able to cover, here's our daily digest of car stuff on the Web you may not otherwise have heard about. -- Blood pumping, screaming your lungs out -- do you remember that first joyride during your formative years?