Though effectively eliminated with the introduction of the new rules in 2014, exhaust blowing, whereby 'trick' engine modes are used in order to direct exhaust gases so that they assist with downforce, appears to be creeping aback into the sport following the high downforce regulation changes of 2017. At the centre of attention since its appearance in pre-season testing has been the Renault, though the French team and the FIA's Charlie Whiting insist all is legal. However, with a number of other teams, including Ferrari, understood to be looking into the practice, the FIA has opted to act, with the governing body's single-seater technical boss, Nikolas Tombazis, writing to all the teams...
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