Installation instructions:

Step 1: Start OpenIV.

Step 2: Go to Grand Theft Auto V\x64e.rpf\levels\gta5\vehicles.rpf

Step 3: Replace Rumpo.ytd.

Step 4: Go to Grand Theft Auto V\update\x64\dlcpacks\patchday3ng\dlc.rpf\x64\levels\gta5\vehicles.rpf and replace Rumpo.ytd and it's +hi version.