Trick exhaust systems have been the major topic of conversation in the lead up to the new Formula 1 season, but people have been using exhausts to achieve other ends for many years. It comes and goes.
Many of the teams have experimented with different solutions but the purpose is the same: to increase the velocity of airflow underneath the car and thus generate downforce. It's about trying to get that airflow to the underfloor moving as quickly as possible - ¬the diffuser will suck on that and speed the air up by a certain amount. So the faster you can get the airflow to the front of the floor, the better the work the diffuser can do and create more downforce.
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