Red Bull give Vettel new chassis for Spain

Red Bull Formula One driver Sebastian Vettel of Germany arrives before the first practice session of the Bahrain F1 Grand Prix at the Bahrain International Circuit (BIC) in Sakhir, south of Manama April 4, 2014. REUTERS/Thaier Al-Sudani

(Reuters) - Sebastian Vettel will have a new Red Bull chassis for Sunday's Spanish Grand Prix in a switch that could give the quadruple Formula One champion a boost even if the team said it was unrelated to his lack of form so far this season.

Chief designer Rob Marshall told the Red Bull website on Wednesday that the change, replacing the central tub that the driver sits in, had been scheduled at the start of the season.