Customized vehicles refer to vehicles specifically designed to appear with an heavily modified appearance or support said modifications. Vehicles listed in this category include any form of custom cars (including hot rod), lowriders, vehicles tailored for motorsports, and generally any other vehicle which is already available modified.

This categorization is not to be confused with standard vehicles in GTA San Andreas which require visits at Transfender to be customized, or variants of vehicles used for public services (i.e. police cars).