A connector system for attaching diffusers to automotive vehicle exhaust systems which, in accordance with the characteristics thereof, provides a connector system in a specific structure of the mechanical type and based in an outlet nozzle with a groove flange, a tongue flange making the interface outlet nozzle-diffuser, an outlet connector with a tongue flange making the interface to the automotive vehicle exhaust system, a groove flange making the interface outlet connector-diffuser, and fixing clamps for the pairs of tongue-groove flanges, in order to provide complete optimization procedures to press fit and fasten the diffusers and their parts such as outlet nozzles and outlet connectors to automotive sports vehicle exhaust systems, coupled with a 360-degree double rotating system of their parts.