NOVELTY - Fluid distribution insert for a fuel cell assembly comprises: (a) a hollow insert with a first end and a second end; (b) an inlet formed at the first end of the hollow insert to receive a fluid; (c) a first coupling member formed adjacent the first end of the hollow insert; (d) a second coupling member formed adjacent the second end of the hollow insert; (e) outlets formed intermediate the first end and the second end; and (f) flow channels formed in the hollow insert.    USE - The fluid distribution insert is used for a fuel cell assembly (claimed).    ADVANTAGE - The inlet header insert for a fuel cell stack facilitates a substantially simultaneous delivery of a hydrogen fuel to each fuel cell in the fuel cell stack at the initiation of an electrochemical fuel cell reaction. The insert is produced in a cost effective manner.    DETAILED DESCRIPTION - Fluid distribution insert for a fuel cell assembly comprises: (a) a hollow insert with a first end and a second end, where the hollow insert is received within an inlet header of a fuel cell assembly; (b) an inlet formed at the first end of the hollow insert adapted to receive a fluid; (c) a first coupling member formed adjacent the first end of the hollow insert to couple the inlet of the hollow insert to a fluid supply conduit; (d) a second coupling member formed adjacent the second end of the hollow insert to facilitate coupling the hollow insert to the fuel cell assembly; (e) outlets formed intermediate the first end and the second end; and (f) flow channels formed in the hollow insert providing fluid communication between the inlet and the outlets to deliver the fluid to fuel cells of the fuel cell assembly, where the flow channels provide for a substantially simultaneous delivery of the fluid to the fuel cells. An INDEPENDENT CLAIM is included for a fuel cell assembly comprising: (a) a first end plate and a spaced apart second end plate; (b) fuel cells disposed between the first end plate and the second end plate; (c) an inlet header in fluid communication with the fuel cells for supplying a reactant gas to the fuel cells; (d) a hollow insert with a first end and a second end; (e) an inlet formed at the first end of the hollow insert adapted to receive the reactant gas; (f) outlets formed intermediate the first end and the second end; and (g) flow channels formed in the hollow insert providing fluid communication between the inlet and the outlets to deliver the reactant gas to the fuel cells of the fuel cell assembly.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of the fuel cell stack.    Fuel cell assembly (10)    Stacked fuel cells (12)    End plates (14,16)    Inlet port (18)    Outlet port (20)    Inlet header (22)    Outlet header (24)    Inlet (26)    Outlet (28)    Supply conduit (36)