In this video Fabspeed owner, Joe Fabiani, goes over Fabspeed's Cup High-Performance Air Box Cover that improves airflow into your air cooled 911. These air box covers are for all Carrera 3.2 1984-1989 Coupes and Cabriolets, 964 1990-1994 Carrera Coupes, Cabriolets, and RS Models, 993 Models Carrera Coupes, Cabriolets, and RS Models.
https://www.youtube.com/watch?v=lL0sOjRve2A