AVO S1104K941001T Top Mount Intercooler - Forester (05-09 Legacy GT/Outback XT / 08+ WRX / 09+) Our turbochargers have been designed to perform in the harshest conditions possible, and have been tested in them as well AVO products are not designed to be as reliable as OEM - they are designed to be much better than OEM The reduced back pressure of the AVO exhaust system as a whole gets rid of the terrible dip in the torque curve, and the improved flow increases performance