Cover: Porsche 911 964 1989-1990-1991-1992-1993. You are buying a 1989-1993 Porsche 911 Factory Service Workshop Manual. This is the very same manual that your local Porsche dealer technician uses in repairing/servicing your vehicle. This manual covers every service and repair imaginable, from oil changes to rebuilding the transmission. Perfect for the DIY person!!! file format: PDF