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

Caterham Seven 165 prototype stars at the 2013 Frankfurt Motor Show

2013 marks 40 years of Caterham Cars since what was originally a Lotus dealership took over production of the Series 4 Lotus Seven in 1973. Now, at Frankfurt 2013, the British manufacturer is debuting its newest model – the Seven 165 prototype – set to become the entry-level version and the lightest, most efficient Caterham ever when it goes on sale in the UK in 2014. We like the fact that you will be able to buy a Caterham for less than £17,000 and still be able to embarrass much more expensive machinery when the going gets twisty.

At GM, the tail fin is back--but now it's a blade

Tail fins are making a comeback at General Motors Co., although they are a far cry from the saillike appendages of the 1950s. And this time the company is calling them blades. The look, pioneered on the Chevrolet Volt to improve aerodynamics, will appear on other models to boost fuel economy, said Ed Welburn, GM's global design chief.

McLaren 650S priced from £195,250 and does 0-62mph in 3.0 seconds

The new McLaren 650S (pictured) costs from £195,250 It’s only ten days since the McLaren 650S was revealed as a more hardcore version of McLaren 12C supercar – and with more than a hint of P1 styling – but McLaren are already building it and have revealed performance and price details. Available as either a 650S Coupe or 650S Spider, the starting point is £195,250 for the Coupe and £212,250 for the Spider, that’s almost £20k more for the 650S Coupe than the 12C Coupe and £17k more for the Spider. But apart from the more dramatic styling, increased downforce and tweaks from the extra power – the 650S gets 641bhp – to the improved handling and dynamics, you also get increased levels of optional equipment including carbon racing seats from the P1, rear parking camera and full carbon fibre interior.