What does this mod do ?
As the title says : now vehicles and not only ( aircrafts, boats etc. ) got a new damage system, improved to look better, to be funnier and, of course, to be more realistic.

Why is this different from the other similar mods ?

Because each vehicle has it's own damage system. That means trucks and heavy mass vehicles are hardly damaged and do more damage to the other low-weight vehicles like street ones.
And not only the trucks are different, each vehicle type from muscles to vans and/or sport/off-road cars got their unique way of getting and doing damage(d).

How to install ?
It's just like the others : You first need OpenIV ( http://openiv.com/ ) ; Open it and search for this : update>update.rtf>common>data ; now press on the "Edit mode" rectangle and simply drag&drop the handling.meta file inside the location above ( data ). Press again on "Edit mode" to turn it off, exit the OpenIV and you're able now to enjoy the mod.

Other mods used ( and highly recommended for fun seekers ) :
https://www.gta5-hub.com/misc/enhanced-explosions-drkz
https://www.gta5-hub.com/misc/vehicleaihandlinginfo

Backup for the original handling.meta file :
http://www.filedropper.com/handling