Designed to compete in international GT racing, the RSR was one of the final developments of the Porsche 911 Type 964, representing a significant evolution for the model and marking Porsche’s renewed dominance in GT racing. Derived from the limited RS 3.8, the RSR featured a lightweight Turbo body and was designed for top-level racing events. Its model-specific Type M64/04 3.8-liter air-cooled flat-six engine, featuring 11.4:1 compression, lighter pistons, dual ignition, individual throttle bodi