This fuel hanger surge tank (FHST) works in conjunction with the OEM in-tank fuel pump module in the Nissan 370Z. The OEM module provides fuel to the surge tank, keeping it full, while the pump(s) in the FHST feed fuel to the engine. It provides a way to upgrade the fuel pump capacity while also eliminating fuel starvation issues. Features an integrated fuel pressure regulator so no additional regulator is needed. Safe to use with E85. The factory fuel pump must be upgraded to a 340LPH pump in order for the system to function properly. This pump supplies fuel to the FHST.