to install : 
1-Open (Open IV) 

2-go to update\x64\dlcpacks\mpheist\dlc.rpf\x64\levels\gta5\vehicles\mpheistvehicles.rpf

 3-Enable Edit Mode 

4-replace  the hydra.ytd and the hydra+hi.ytd with the ones in the archive 




-please report any bugs !

by:saedsh285
enjy;)