There are various carpacks out there
Like this one:
That one is designed to be as 'light-weight' as possible (limted file-size). Last I checked it also comes with a taxi-bug fix to reduce the amount of taxi's caused by modded cars. This is just an example of one carpack but there are many more out there. Just keepi in mind that it's never without problems, some will cause the taxi-bug and some fixed that but you get a performance reduction in return.
I'd recommend trying out the various carpacks to see if you find one that works for you, just remember to backup your files so you can uninstall it at any time.