according to the specs (4.7L/m) that nismo state for the gtr pump it will out flow a 044 but what it doesn't say is if that is free flow or with pressure.
i just put a 044 intank (R33) and you can barely tell the difference noise wise between it and the stock pump, i used 3 pieces of 25mm fuel resistant PVC tubing opened up and wrapped around the pump and the arm it mounts too.