You need OpenIV to install mods

the cars are probably hi-poly and don't have LODs

It is hardcoded to those cars only, unfortunately. There's no way to implement that to an addon. Best you could do is replace the cognoscenti model to the car you want. Oh yeah, and the windsor doesn't have it actually

@Jx_xo this is normal for first time uploaders. try putting your comment in this thread https://forums.gta5-mods.com/topic/14021/mod-approval-thread/4

in vehicles.meta of the mod under the line <audioNameHash>.
what car mod did you install?

uhh... here?

use this guide to get started

install custom gameconfig by F7YO

20 but that's my normal fps and i'm used to it

Real California Architecture: https://www.gta5-mods.com/maps/real-freeway-signs

replaces signs, shops, road names to their real life counterpart. installation is easy

hi. i run gta 5 on low end pc as well, and i have these mods installed (all mlo, high quality and by the same person):
https://www.gta5-mods.com/maps/designer-house
https://www.gta5-mods.com/maps/venice-beach-house
https://www.gta5-mods.com/maps/mlo-designer-penthouse-remake-add-on-sp

my game works fine with these three, but his Malibu Mansion makes my game laggy