For the GD.II/GG.II Impreza WRX, the EJ205 engine had Subaru’s ‘Active Valve Control System’ (AVCS) which adjusted the opening and closing timing of the intake valves by changing the phase angle of the camshaft sprocket relative to the camshaft; for the GD.II/GG.II Impreza WRX, it is understood that the maximum range of adjustment was 35 crankshaft degrees.