Horner: Red Bull exhausts overrated by rivals
Christian Horner has warned rivals Red Bull that the RB6's exhaust design doesn't deliver everything
IN EVIDENCE
Button predicts problems for rivals with low exhausts
Jenson Button predicts problems for the teams that debut Red Bull-style exhausts in Valencia. Ferrari, Mercedes and
Renault and Mercedes also had low scores in Valencia
Renault and Mercedes, as well as Ferrari, will debut their new Red Bull-style low exhausts this weekend
