Ap Precision Hydraulics Two-way Restrictor Part No 07-3624-a/ Maintenance /parts on 2040-parts.com

Ford Fiesta Zetec S Red and Black Edition revealed – price from £15,995

The Fiesta Black and Red Editions arrive with a 138bhp 1.0 litre EcoBoost Everyone loves a sporty Fiesta – still a cracking little car in any guise – but it looks like Ford has spotted a gap in the market between the Zetec S with the 1.0 litre EcoBoost and the Fiesta ST. So we get the Ford Fiesta Zetec S Red and Black Editions to fill the gap we didn’t actually know was there. Ford has managed to squeeze even more power from their little 1.0 litre, 3-cylinder EcoBoost engine to give the Fiesta Red and Black Editions 138bhp, enough to crack 62mph in just 9.0 seconds.

Alfa Romeo 4C Spider revealed: Geneva Motor Show

The Alfa Romeo 4C Spider (pictured) revealed in Geneva The Alfa Romeo 4C is the epitome of a modern ‘supercar’, with ultra light weight (for a production car) allowing the 4C to produce very good performance from its modest 17500cc engine. So producing an Spider convertible immediately raises the weight issue in a more dramatic way when the car’s abilities are so dependent on it low weight, but it seems the Alfa Romeo 4C Spider – previewed as a production car with a concept at Geneva today – has managed to keep the wight penalties of the convertible 4C down to a minimum. Thanks to a canvas roof and carbon fibre rollover bars, the weight penalty for the Spider is only about 60kg (around a 7 per cent gain) which shouldn’t hurt performance too much.

One Lap of the Web: World of Wheels Edition

-- We reported on carbon-fiber wheels almost exactly a year ago. Back then, our Carbon Revolution test also came with a gaggle of obsequious matte-wrapped BMWs against a soundtrack of David Guetta and overpriced exhausts. This latest episode of "Inside Koenigsegg" examines the art of carbon fiber wheels at 280 mph.