... of fuel system (1). Different connectors can be combined with gauge outfits for different cars. A. When it is ... Audi five-cylinder engine, gauge outfit can be combined with Connector 1 and 2. B. When it is used ... Audi six-cylinder engine, gauge outfit can be combined with Connector 3 and 4. C. When it is ... Jetta, Red Flag, Audi 80 and Audi 100, gauge outfit can be combined with Connector 5, 6, 7 and 8. ...