Installing:
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1:Copy SilviaGD folder to
X:\Grand Theft Auto V\mods\update\x64\dlcpacks

2:Use OpenIV go to
X:\Grand Theft Auto V\update\update.rpf\common\data\dlclist.xml

right click dlclist.xml click edit, add new line
  
  Dlclist : \SilviaGD\

  spawm name : silviaGD

  Credits
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  1. Base model :
 
  2. https://id.gta5-mods.com/vehicles/2002-nissan-silvia-s15-add-on
  
  4. Reddit : REDZ

  5. Livery concept : Garasi Drift Majoratte

  6. Livery Decal : REDZ