Always Back up !
you can use any trainer to spawn a T20

*HOW TO INSTALL________________*

use openiv to add
t20.yft t20.ytd t20_hi.yft t20+hi.yt at
Grand Theft Auto V\update\x64\dlcpacks\mpchristmas2\dlc.rpf\x64\levels\gta5\vehicles\xmas2vehicles.rpf\

replace
vehicles.meta at
Grand Theft Auto V\update\x64\dlcpacks\mpchristmas2\dlc.rpf\common\data\levels\gta5

replace
handling.meta at
Grand Theft Auto V\update\x64\dlcpacks\mpchristmas2\dlc.rpf\common\data

________________________________*

try not to CUSTOM it in Los Santos