Unlocking LM Cars in Showroom..

7
Philippines
Philippines
(In Gran Turismo 4) Hello all, How to unlock Mazda RX-7 LM Race Car, Subaru Impreza Super Touring Car, Mitsubishi FTO Super Touring Car, Jaguar XJ220 LM Race Car, Mazda RX-8 Concept LM Race Car, Nissan GT-R Concept LM Race Car, Toyota RSC Rally Raid Car, and other hidden LM race cars in showroom!! please tell me the code. I want to see them in showroom and not unlocking them in the events.
 
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