Problem with (replace) cars (GTA5) (Grand Theft Auto 5)

The situation is this:
1 - I bought a powerful PC (i5 9400f; rtx 2060; 16gb ram)
2 - I downloaded GTA5 on the SSD and decided to install mods))
3 - Installing the mod on graphics (1.8 REDUX), I saw a positive result: it worked!!
4 - I felt a little alone graphics and I installed the high poly model cars (replace).
5 - After the installation of the machines, the GAME did NOT LAG AND MISITI. But began to disappear texture of houses and roads (AND the GAME does NOT LAG AND NOT PRISILA, as I wrote above).
6 - Sometimes, the game crashes with an error related to insufficient memory !!!(NOTE I HAVE 16GB)!!!
It would be nice to solve this problem)) Waiting for answers :)



The same, but the number of errors, not 4 or 5 1.