Ferrari Part Number 13543421, STUD FOR AIR PUMP shown here as used in Ferrari 308 GTB/GTS (steel body after 1976) Table 24 Gearbox - Differential Housing And Oil Sump (308 Gts And Aus). Location in Diagram: 66. Required Quantity: 1. This Ferrari part is used in more than one diagram. Click on the diagrams below to see alternative uses of this part: