F1Today has learned that Renault will use the majority of their 12 tokens for an updated power unit that is set to be available exclusively for Red Bull and not Toro Rosso.
This weekend will see the French Manufacture's along awaited upgrade, as so far they have yet to update their 2015 Engine. The updates mainly lie with the internal combustion engine and also some small changes to the turbo. Most importantly, the new Power Unit has passed a full cycle on the dyno, which guarantees it's reliability.
Renault will allow Red Bull to decide whether they will use it or not, if do, then they will incur a Grid Place Penalty for the US Grand Prix.
Written by Harry Shovelar
Bahrain International Circuit - Winter testing