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

The first SRT Viper is sold, we spot an exotic XTS, and the 2013 SVT Raptor offers more off-road fun, this week's Autoweek in review

The first SRT Viper crossed the block at Barrett Jackson in Orange County this past week, for a cool $300,000. All the proceeds will go to the Austin Hatcher Foundation, a charity to help families and children affected by pediatric cancer. While the Cadillac XTS hasn't been a stranger on public roads around Michigan, this heavily camouflaged example is a bit of a mystery.

Chevrolet Malibu (2012) first official pictures

This is the new 2012 Chevrolet Malibu - an executive-sized four-door saloon aimed at the US. But this one could come to Europe and the UK, as a halo car for the Chevrolet brand, CAR understands. The Chevy Malibu is a US market car.

Nissan LEAF becomes London Taxi

Nissan has been ferrying Londoners and tourists round the capital in the Nissan LEAF EV free of charge as part of its ‘Big Turn On’ campaign. Yesterday we reported that a Nissan LEAF was going to go backwards up the hillcimb at Goodwood in a bid for a reversing speed record, and to draw attention to the LEAF’s strengths as part of Nissan’s ‘Big Turn On’ campaign. We’re not too sure how being able to go backwards as quickly as you can forwards in a LEAF is a big selling point, but Nissan’s stunt in London this week is far more relevant – they’ve been offering fee taxi rides in the electric LEAF to tourists and Londoners alike.