FIA expects 2013 exhaust rule changes

Formula 1 race director Charlie Whiting has admitted that further adjustments to the sport's exhaust regulations are likely to be required for 2013 to stop teams finding ways of replicating the effect of the blown diffuser. Changes to the rules this year are aiming to make it impossible for exhaust gases to be directed in a way that helps the underfloor aerodynamic performance, but there have been suggestions that some teams are finding ways to achieve a similar effect within the revised rules

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