Pirelli will become the naming sponsor of two grands prix in 2014.
The Italian company has been F1's often-controversial sole supplier of tyres since 2011, but this season will be the first time grands prix are actually named after Pirelli.
It emerges that the Spanish grand prix in May will officially be called 'formula 1 gran premio de Espana Pirelli', while the Budapest race in July will be 'formula 1 Pirelli Magyar Nagydij'.
Pirelli's motor sport boss Paul Hembery told reporters as the Bahrain test concluded on Sunday that the news will soon be announced officially.
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