MOSTPLUS 255LPH EFI Fuel Pump For BMW E31 830i 840Ci 850i 850Ci 850Csi M8 Composite Turbine Impeller design brings quiet operation 39mm diameter fits most applications Designed for high output naturally aspirated and forced induction EFI vehicles 255LPH/43PSI(13.5V) & 190LPH/80PSI(13.5V) 5 years warranty