Initial D: Street Stage (Sony PSP)
CheatingDome.com
Bunta mode and his Impreza WRX type R STi
Beat every battle in Legends of the Streets mode. After the credits, go to the Card Collection menu and view special Card #163.
Xside
Keep losing to Bunta level 10 at Irohazaka. Select the left card. This is where the engine upgrade usually appears.