Sauber team boss Monisha Kaltenborn says revisions to the exhaust system on the team's C32 during the middle of the F1 season are the key factor behind the improvements seen in recent races.The Swiss team had gone into the 2013 campaign hoping to build on an impressive season in 2012 but scored just seven points prior to the summer break.Despite another no score when racing resumed at Spa, the team has since gone on to pick up 38 points in the last four races, with many putting the improvement down to the revised Pirelli tyres that came in in Hungary and although she said they had helped, Kaltenborn said other factors had played a more important role in the team returning to form.“After...
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