As part of what it calls "the most extensive and robust pre-order offer" the Gran Turismo series has ever seen, SCEA has announced pre-orders for Gran Turismo 6 in North America will add four new vehicles to the game's roster: BMW Z4 GT3 '11, Nissan GT-R NISMO GT3 '13, Tesla Model S Signature Performance '13 and Chevrolet Corvette Stingray (C7) '14.

GameStop pre-order customers will be updated to the retailer's exclusive "15th Anniversary" edition of Gran Turismo 6 at no additional cost, featuring a total of 20 new rides (including those mentioned above), PlayStation Blog US reports. The 15th Anniversary Edition also features customized paint chips, a race suit, helmet, PSN avatar and Beyond the Apex 2 - the next evolution of the Blu-ray exclusive GT5 Prologue Beyond the Apex experience.

Amazon pre-orders will net $1 million in in-game credit, plus the aforementioned four-car pack. In Europe, the Anniversary Edition will be offered through select retailers - full details are over on PlayStation Blog Europe.

Gran Turismo 6 is slated to launch this holiday season and Sony has said it is confident there will be no delay.