I have a 2004 s40 1.9T and need to know the hose size for the power steering suction line (from the resivoir to pump)? I had thought it was 3/8" and bought a 3/8" magnefine and compatible hose clamps. The supply hose is much wider than I thought, even though the high pressure line looks like it is probably 3/8" Has anyone any experience in this installation that knows what size filter and clamp I will need. Thanks