Former champions Red Bull say they have no plans to make their own engine and could be forced out of Formula One if current partners Renault walk away. "We have no intention of being an engine manufacturer," team principal Christian Horner said at the Malaysian Grand Prix, reiterating a stance that has been questioned of late as tensions with Renault come to the fore. Horner said that if Renault decided to quit the sport, a possibility raised by Renault F1 managing director Cyril Abiteboul, then Red Bull might not be able to find an alternative. He said that was what the team's motorsport consultant Helmut Marko had meant when he suggested after this month's Australian...
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