BUSINESS END

At the rear, a monster diffuser optimises air extraction from the underbody and makes the FXXK a pain to reversepark. In low-drag mode, it has double the downforce of what we must laughingly refer to as the ÒstandardÓ car. When itÕs in maximum-attack, full-aero mode, it generates another 30 per cent Ð that means 540kg at 130mph