MESSAGE REDACTED: I found a nice cheat for Gran Turismo 3 A-Spec NTSC-U v1.1 That allows to have no tire damage. I apologize for reviving this thread but for beginners like me who want no tire damage...
CRC is 8AA991B0
Code is
No Tire Damage (Always Blue)
patch=1,EE,201E82E0,extended,00000000
Update: Can someone please help to change that to always green tires, please?