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

Concept Car of the Week: Saab Aero X

In January 2005 Bryan Nesbitt, then-executive director of GM Europe Design, charged the 15-strong Saab Advanced design team in Gothenburg, Sweden, to create the "ultimate vision of the brand". The design team – led by head of Advanced Design at Saab, Anthony Lo – worked on a number of sports car proposals, which were considered 'the jet fighters of the road.' The chosen proposal by Alex Daniel was for a large, front-engined sports car that would become one of the most universally acclaimed concept cars of recent times. Of course the Aero X's door arrangement – complete with huge, forward-hinged canopy – is its party trick, but even without the theatrics the car's proportions, surfacing and graphics are exceptional.

Some Chevrolet dealerships halt Volt sales due to tool costs

Some Chevrolet dealers have stopped carrying the Volt after deciding that their sales didn't justify an additional $5,100 for tools to service the plug-in hybrid. Last month, General Motors notified Chevrolet dealers of the added cost for tools, among other requirements, to keep selling and servicing the Volt. The math didn't work for Allyn Barnard, owner of Jim Barnard Chevrolet in Churchville, N.Y., near Rochester.

Megane Renaultsport 275 Trophy revealed

Meet the hottest Renaultsport Megane ever – the Megane Renaultsport 275 Trophy, which Renault hopes will eat the SEAT Leon Cupra for breakfast around the infamous Nurburgring test track. Packing, you guessed it, 275hp, the 275 Trophy has an extra 10hp over the standard Megane Renaultsport. Exact performance figures are still to be confirmed but Renault tells us the Trophy will return 37.7mpg, with peak power from its twin-turbocharged engine coming at 5,500rpm.