Sony has announced that the final online event for Gran Turismo 5 will give players the chance to snap up six cars for Gran Turismo 6. This comes from news that the online services for Gran Turismo 5 will stop on the 31st of May.
For people who take part in the online event, you will have the chance to play it from now till the end of this month. After that moment, you will need to sign into Gran Turismo 6 on the same PlayStation account between June 2 - 29 to get the cars.
The cars that will be awarded are the Abarth Grande Punto '09, Renault Sport Megane R.S. Trophy '11, Nissan Fairlady Z (Z34) '08, Tesla Motors Model S Signature Performance '12 and the Subaru S206 NBR Challenge Package '12.
As well as the servers shutting down on the 31st of May, DLC for the game will also be taken down, so if you have not yet purchased them and want to, this will be your last chance.
Source: Gran Turismo Official Website