Well worth a read this article from F1 Fanatic.I can hear the protests being rehearsed already.
http://www.f1fanatic.co.uk/2012/02/28/2012-exhaust-innovations-mclaren/
The FIA has introduced a raft of new rules aimed at curtailing the use of exhaust-blown diffusers.
Despite this, evidence from the first two tests suggests teams are using exhaust gases for aerodynamic benefit.
McLaren have come up with one of the more interesting solutions addressing the new restrictions on exhausts for 2012. John Beamer takes a look at what they’ve come up with for the MP4-27.