Complex sentence: The race was won by the BMW 335i of Chaz Mostert and Nathan Morcom and was the only round of the 2011 Australian Manufacturers' Championship not won by Stuart Kostera.
Split into simpler sentences: The race was won by the BMW 335i of Chaz Mostert and Nathan Morcom. This was the only round of the 2011 Australian Manufacturers' Championship not won by Stuart Kostera.