The FIA has given the McLaren team the green-light to use their controversial rear wing in Bahrain.
The wing had been contested by Red Bull and Ferrari, although Ferrari later denied any involvement.
The problem arose when a slit was added, stalling the air, giving the Woking based squad a speed advantage on straights.
While another little innovation on the McLaren car involves a knee-operated air inlet, which the drivers can open and close to channel air through the body and out through the rear of the car.
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