FUEL RAIL ASSEMBLY

A Fuel rail assembly (3) for an internal combustion engine (1) is disclosed. It comprises a plurality of fuel delivery lines (11) branching off from a fuel rail (31), each fuel delivery line (11) hydraulically coupling one fuel injector (7) to an outlet port (39) of the fuel rail (31). Each fuel delivery line (11) has a one-pieced pipe (41) which extends from an outlet port (39) of the fuel rail (31) to the respective fuel injector (7). The pipe (41) has a cylindrical connection section (43) adjoining the respective outlet port (39) and a cylindrical injector cup section (47) in which a fuel inlet portion (705) of the respective fuel injector (7) is received. The connection section (43) and the injector cup section (47) have different hydraulic diameters.