http://cheats.ign.com/ob2/068/013/013846.html

http://www.gamespot.com/ps2/driving/granturismo3aspec/hints.html

http://www.neoseeker.com/Games/cheats/PS2/granturismo3.html

http://www.consolecheatcodes.com/playstation2/granturismo3cheats.html

http://www.gamefaqs.com/console/ps2/code/197470.html

http://www.gamerevolution.com/cheat/ps2/gran-turismo-3-a-spec

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http://www.gamewinners.com/playstation2/GranTurismo3.htm

http://www.supercheats.com/playstation2/granturismo3aspeccheats.htm

http://www.playstation2-cheats.co.uk/your_cheats.php?4406

http://www.cheatsguru.com/ps2/gran_turismo_3_a_spec/

http://www.cheatcc.com/psx2/gt3as.html