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@officerk9 Add add-on vehicle, if it includes tuning parts or vehicle body, Trainer is required
Brush it out. Many times, the tuning parts or vehicle body are not displayed in the vehicle modification options of the Trainer because there is a conflict with the mod kit ID. We need to modify the "carcols. meta" file of this vehicle, find the line "<id value=" xxxxx "/>", and modify the ID value. In most cases, use values within 1000 or try values within 65535, such as "<id value=" 998 "/>" or "<id value=" 65535 "/>", and then try sequentially based on the values, subtracting 1 each time. For example, if 998 doesn't work, try "<id value=" 997 "/>" until the Trainer in the game
Until the components can be successfully brushed out. Usually, after a few attempts, you can find IDs without conflicts.

Reference materials for specific GTA5 mod kit ID issues:
https://gtaforums.com/topic/878363-cant-get-tuning-to-work-for-addon/

You can also try using related plugins:
ModKitLimit extender (ModKit quantity limit modification, can be used as a reference). I did not use the plugin and did not verify its effectiveness
https://www.gta5-mods.com/tools/modkitlimit-extender/

Vehicle Kit ID Getter 1.1 Report (Vehicle ID query, auxiliary tool, can be used at discretion). I tried it out and couldn't find all the IDs
https://www.gta5-mods.com/tools/vehicle-kit-id-getter

Add add-on vehicle, if it includes tuning parts or vehicle body, Trainer is required
Brush it out. Many times, the tuning parts or vehicle body are not displayed in the vehicle modification options of the Trainer because there is a conflict with the mod kit ID. We need to modify the "carcols. meta" file of this vehicle, find the line "<id value=" xxxxx "/>", and modify the ID value. In most cases, use values within 1000 or try values within 65535, such as "<id value=" 998 "/>" or "<id value=" 65535 "/>", and then try sequentially based on the values, subtracting 1 each time. For example, if 998 doesn't work, try "<id value=" 997 "/>" until the Trainer in the game
Until the components can be successfully brushed out. Usually, after a few attempts, you can find IDs without conflicts.

Reference materials for specific GTA5 mod kit ID issues:
https://gtaforums.com/topic/878363-cant-get-tuning-to-work-for-addon/

You can also try using related plugins:
ModKitLimit extender (ModKit quantity limit modification, can be used as a reference). I did not use the plugin and did not verify its effectiveness
https://www.gta5-mods.com/tools/modkitlimit-extender/

Vehicle Kit ID Getter 1.1 Report (Vehicle ID query, auxiliary tool, can be used at discretion). I tried it out and couldn't find all the IDs
https://www.gta5-mods.com/tools/vehicle-kit-id-getter

@RobkeRobke Add add-on vehicle, if it includes tuning parts or vehicle body, Trainer is required
Brush it out. Many times, the tuning parts or vehicle body are not displayed in the vehicle modification options of the Trainer because there is a conflict with the mod kit ID. We need to modify the "carcols. meta" file of this vehicle, find the line "<id value=" xxxxx "/>", and modify the ID value. In most cases, use values within 1000 or try values within 65535, such as "<id value=" 998 "/>" or "<id value=" 65535 "/>", and then try sequentially based on the values, subtracting 1 each time. For example, if 998 doesn't work, try "<id value=" 997 "/>" until the Trainer in the game
Until the components can be successfully brushed out. Usually, after a few attempts, you can find IDs without conflicts.

Reference materials for specific GTA5 mod kit ID issues:
https://gtaforums.com/topic/878363-cant-get-tuning-to-work-for-addon/

You can also try using related plugins:
ModKitLimit extender (ModKit quantity limit modification, can be used as a reference). I did not use the plugin and did not verify its effectiveness
https://www.gta5-mods.com/tools/modkitlimit-extender/

Vehicle Kit ID Getter 1.1 Report (Vehicle ID query, auxiliary tool, can be used at discretion). I tried it out and couldn't find all the IDs
https://www.gta5-mods.com/tools/vehicle-kit-id-getter

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