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

Concept Car of the Week: Dodge M4S PPG Turbo Interceptor (1985)

As a major paint supplier of Detroit's big three, PPG would commission every year a car to be used as a pace car in the Indy Car World Series. In 1984 Chrysler began the development of a mid-engined, rear-wheel drive car using an experimental powertrain. To avoid the costs of creating a whole new chassis, the M4S is based on a modified Huffaker tubular chassis with full roll cage taken from the Pontiac Fiero IMSA race car, only lengthened to a 100-inch wheelbase.

GQbyCitroen unveiled in London

Two days after unveiling the Survolt and DS High Rider concepts at the Geneva motor show, Citroen last week pulled off a rare surprise by unveiling the GQbyCitroen - its third concept in three days. Instigated around a year ago, the project is a result of GQ Magazine's editor Dylan Jones questioning what his readers' ideal car might look like, and subsequently being put in touch with Citroen's Mark Lloyd, design manager for this project. The concept is a 4.5m long shooting break, based on the C4 platform.

Lamborghini Sesto Elemento is official – just 20 to be built

Lamborghini Sesto Elemento - it's official Perhaps the worst-kept secret at Lamborghini has been production confirmation of the Sesto Elemento, the ultra lightweight supercar Lamborghini revealed at the Paris Motor Show this time last year. As long ago as November last year we had the news that the Sesto Elemento would go in to production after a French car news site reported that Lamborghini would be building a very limited run of the cars at €2.5 million each. By May of this year we knew that Lamborghini had already started getting the Sesto Elemento ready for the first customers, and we reported that the first cars would be heading for customers by October this year at a more reasonable €1.9 million – although that’s October in Italian terms, so anything up to next Spring is possible.