Arias Pistons 12.5:1 Compression 82mm Bore Honda B-series on 2040-parts.com

At GM, the tail fin is back--but now it's a blade

Tail fins are making a comeback at General Motors Co., although they are a far cry from the saillike appendages of the 1950s. And this time the company is calling them blades. The look, pioneered on the Chevrolet Volt to improve aerodynamics, will appear on other models to boost fuel economy, said Ed Welburn, GM's global design chief.

BMW X3 reloaded

BMW has revealed the first official details of its second-generation X3 prior to its world debut at the upcoming Paris motor show. Set to go on sale in the United States in January 2011, BMW says the new X3 will be priced close to the outgoing model. The upmarket off-roader has been completely redesigned and reengineered in a move BMW hopes will see it emulate the first-generation model's success, sales of which have now topped the 600,000 mark worldwide since its introduction in 2003.

Fiat 500L gets a helping hand from P Diddy (video)

Sean ‘Diddy’ Combs gives Fiat a helping hand with the 500L Fiat has done well to convince a trendy section of American car buyers that the Fiat 500 is a funky, cute and desirable runaround – especially if you live in the city. But having effectively put all their eggs in the 500 basket, they have the problem of convincing sceptical US car buyers that the much bigger Fiat 500L is an appealing – and much more practical – proposition for families. So Fiat has enlisted Sean Combs (P Diddy, Puff Daddy, Diddy or whatever moniker he’s using this week) to give the Fiat 500L a bit of much needed profile.