This mod makes each car that has the same sound makes different sounds. An example is Cheetah and Banshee, they do have the same sound before and in this mod they don't(Plus GTA IV Sound is included)

This mod makes GTA SA Vehicle sounds better, own sound priorities for each vehicles.

Watch the video link below to understand the mod

Sound priorities of each vehicle:
Cheetah - Forklift(Coquette)
Sabre - Kart/Mower(IVSabreGT)
Sultan - Caddy(IVSultan)
Turismo - Phoenix/Windsor/HotringRC(IVTurismo
Comet/SuperGT - Infernus(IVInfernus)
Buffalo - Feltzer(IVBlistac)

Enjoy downloading the mod

youtube:
https://www.youtube.com/watch?v=oTfjeLUNdb8&t=10s