The fuel discharge nozzles at the cylinder each contain a calibrated jet that is sized according to the system flow requirements of the engine. All nozzles used in Bendix fuel systems are designed to flow the same (32 PPH @ 12 PSI) and all have an "A" stamped on one hex that designates the location of the air bleed hole. When installing, torque so that the "A" is located down and then the hole is pointed up so that residual fuel is prevented from escaping.