1988 Volkswagen Fox Fuel Injection Fuel Distributor O-Ringat Diff. Pressure Reg. 1988 Audi 5000 Fuel Injection Fuel Distributor O-RingAspiration: Naturally Aspirated, at Diff. 1987 Audi 5000 Fuel Injection Fuel Distributor O-RingAspiration: Naturally Aspirated, at Diff.