The NRL side has won 37-26, with Peta Hiku scoring a hat-trick of tries after earlier conceding one as he tried to guide the ball over the dead ball line.
Coach Stephen Kearney says his halves of Kodi Nikorima and Blake Green stood up.
He says Green's kicking game, which gave them several repeated sets, was crucial in the second half.
Parramatta have beaten Penrith 16-10.