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

Mercedes AMG GT teased on video

The new Mercedes AMG GT gets teased on video. Mercedes effective replacement for the SLS – the Mercedes AMG GT – is due to be revealed at the Paris Motor Show later this year, but Mercedes has already started the slow reveal of the AMG GT with photos of the interior last month. Pitched a bit further down the supercar ladder than the SLS, the AMG Gt is aiming to take on cars like the Porsche 911 and deliver a car that Mercedes hope will be the benchmark in its class.

Video shows Audi R18 'long tail' e-tron quattro's blistering Monza run

Audi has had a pretty solid run at the 24 Hours of Le Mans over the past decade, but we're glad they keep pushing the envelope. That's how they keep devising road-going spaceships like the staggeringly fast R18 e-tron quatto equipped with a “long tail” aerodynamic package. This quick video of the “long tail” hybrid testing at Monza gives us a preview of what we can expect at Spa next month -- and hints at what we'll see at Le Mans in June.

GM delays innovative new diesel truck engine

General Motors' deteriorating financial situation has caused the company to delay one of the most advanced engines that it has ever designed, a 4.5-liter diesel for light-duty trucks. "We have to make tough decisions right now," GM Powertrain spokeswoman Susan Garavaglia said. Truck enthusiasts were eagerly awaiting the engine, which would have started production next fall at GM's plant in Tonawanda, N.Y.