Red Bull rule out new diffuser

LONDON: Chinese Grand Prix winners Red Bull have ruled out a major design change to their Formula One car before next month's showcase Monaco race.

Adrian Newey, the team's chief technical officer, said on Tuesday there was no doubt the 'double-decker' rear diffuser used by championship-leading rivals Brawn GP would improve performance.

"It is worth doing for everyone on the grid," he said in a team preview of Sunday's Bahrain Grand Prix after Germany's Sebastian Vettel led Australian Mark Webber to a breakthrough one-two victory for Red Bull in Shanghai on Sunday.