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

Concept Car of the Week: Pininfarina CNR-PF (1978)

In the 1970s alarm bells were ringing in the energy sector as a series of energy crises and rising fuel prices spiralled. The car industry was forced to produce a new generation of more efficient cars and designers were putting new models through wind tunnels to optimize their aerodynamic performance to reduce aerodynamic drag. Some pushed the limits further than others and none more so than Pininfarina, which designed a car that slipped through the air twice as efficiently than any other.

Corvette ZR1 'Blue Devil' freed from sinkhole

Update: Video of the ZR1 removal added below. Workers at the National Corvette Museum have begun removing eight cars from the bottom of a sinkhole that appeared inside the museum's Skydome last month. The first car to make it back to ground level is the 2009 Corvette ZR1 prototype nicknamed "Blue Devil." Incredibly, the ZR1 reportedly cranked right up and even made it to the doorway of the Skydome under its own power.

2013 Mercedes-Benz GL63 AMG packs 550 hp

Mercedes-Benz is adding a fire-breathing AMG variant of the GL sport-utility vehicle for the first time for 2013. The people hauler will pack a biturbo 5.5-liter V8 rated at 550 hp and 560 lb-ft of torque. Code-named M157, it's capable of propelling the ute to 60 mph in 4.9 seconds en route to an electronically limited top speed of 155 mph.