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

The BMW M5 is back!

BMW's M division has gone back to the drawing board with the M5, giving the fifth generation of the iconic four-door a twin-turbocharged 4.4-liter V8 engine—the first time Munich's class-defining performance sedan has gone without a naturally aspirated powerplant since its introduction in 1984. Further changes see it adopt a dual-clutch gearbox as part of a complete driveline rethink that resigns the old model's sequential manual transmission to the history books. Revealed here officially for the first time, the new M5 is planned to make its world debut in concept-car guise at the Shanghai motor show later this month.

New recalls hit 2.7 million GM vehicles, from Corvettes to Saturns

General Motors is recalling 2.7 million U.S. cars and trucks for problems ranging from flawed taillamps and windshield wipers to brake problems, in an escalation of the safety crisis that has enveloped the company for months. GM said today it expects to book up to $200 million in charges in the second quarter to cover the cost of recalls during the period.

Concept Car of the Week: Honda Kiwami (2003)

As part of Honda's exploration into new, clean-performing technologies, the Kiwami concept was created to test public acceptance of the idea of a large, fuel cell-powered luxury sedan.  Unveiled in 2003, the simple yet striking design seemed like a Japanese twist on the Renault Vel Satis concept, which shared a similar wedge profile, wide stance and minimalist approach.  However, the Kiwami found its own interpretation of modern luxury, expressed through elegantly integrated technology rather than with crystal champagne glasses.  Up front, a full-width LED strip headlamp sat flush with the flat bonnet and the rectangular bumper to create a design of primitive beauty.  Further examples of the same simple Japanese aesthetic are found around the car, including the uncluttered body panels and a full-width tail-lamp graphic that matched the front theme.  The dramatic proportions of the interior were closely related to the package of the hydrogen power plant. Unlike other manufacturers at the time, Honda engineers did not create a 'skateboard' fuel cell chassis below the cabin. Instead, a sideways H-shaped layout for the control unit, ultracapacitor, fuel cell stack, hydrogen storage and other components was used, helping to create a lower center of gravity.