NOTE: If your vehicle was originally fitted with a carburettor engine then your fuel tank and supply lines will not suit an EFI fuel pump without the use of a surge tank. The purpose of the surge tank is to prevent the High Pressure Fuel Pump from sucking air or cavitation from lack of fuel flow through undersized intake lines. If the High pressure pump sucks air or cavitates, premature wear will result causing the output pressure to drop, reducing performance or stopping the engine from running, seizing the pump is also possible. For surge tank info click here.