Features (tested in-game):
-71 kph top speed
-70 ton weight

Installation:

1. Open OpenIV
2. Go to update/update.rpf/common/data
3. Extract handling.meta from this zip to a folder and make sure to have a backup.
4. Make sure to enable edit mode.
5. Right click on handling.meta and replace it with my handling.
6. Enjoy! :D