I'm going to spice things up a bit.
I made a mod pack for those who joins the Blacklist. For more realism, I'm making it public to EVERYONE. This mod is recommended for clarity whenever I say this car is modded.
BMW M3 GTR
There will be more in the future.
1) Go to your Rockstar Games folder, or wherever you have San Andreas.
2) Right click on GTA San Andreas.
3) Click copy, or do CTRL + C.
Download Link: Click here.
4) Then press CTRL + V. (This will divide the clean copy of the game and the modded version)
5) Then replace the files with imgtool.
6) Replace handling.cfg, this can be found in C:\Program Files\Rockstar Games\(Modded Version)\data\handling.cfg
7) You're good to go!